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Wahba NKO, Bahnasy SSEL, ElMakawi YM, Dummer PMH, Nagendrababu V, Rossi-Fedele G, Sans FA, Pasqualini D, Alovisi M, Turky M, Ahmed EF, Elheeny AAH. Change in the size of apical radiolucencies in adolescent's mature maxillary incisors following retreatment with two regenerative endodontic techniques: a 12-month randomised clinical trial using volume-based cone-beam computed tomography. Clin Oral Investig 2025; 29:283. [PMID: 40319119 PMCID: PMC12049306 DOI: 10.1007/s00784-025-06344-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2025] [Accepted: 04/14/2025] [Indexed: 05/07/2025]
Abstract
OBJECTIVES The primary aim of this randomised clinical trial was to compare the one year clinical and radiographic outcome of mature permanent central incisors with periapical radiolucencies in adolescents after root canal retreatment using two regenerative endodontic procedures (REPs) with revitalization using induced blood clot formation (BC) or platelet-rich fibrin (PRF) evaluated with cone-beam computed tomography (CBCT). The secondary aim was to assess the responses of the teeth to thermal and electric pulp tests. MATERIALS AND METHODS Fifty-four root filled maxillary central incisors with post-treatment endodontic disease and periapical radiolucencies in 48 adolescents were allocated into two groups (n = 27) using permuted block randomisation. The teeth in one group were root canal retreated with induced BC formation and teeth in the other with PRF. At baseline and at one year, teeth were evaluated clinically and radiographically using periapical radiographs and CBCT scans. Changes in the maximum diameter and volume of the periapical lesions were assessed and pulp sensibility was assessed at one year using thermal and electrical tests. Differences in lesion diameter and volume between the two groups were tested using the Mann-Whitney U test. A linear regression model explored the relationship between independent variables and lesion size. The significant level was set at 5%. RESULTS Reduction in periapical lesion size in the BC and PRF techniques occurred in 85% and 100% of teeth, respectively, with no significant difference. In the BC group, the mean lesion volume diminished from 0.33 ± 0.18 cm3 to 0.13 ± 0.20 cm3, while the mean volume of lesions in the PRF group decreased from 0.27 ± 0.16 cm3 to 0.04 ± 0.06 cm3 with no significant difference between the groups (P > 0.05). Significantly more teeth responded positively to thermal (P = 0.028) and electric (P = 0.032) tests in the PRF group compared to the BC group. CONCLUSIONS REPs using BC or PRF techniques when retreating root canal-treated mature permanent central incisors in adolescents with apical radiolucencies had comparable clinical and radiographic outcomes one year following treatment associated with significantly more positive responses to thermal and electric pulp tests in the PRF group. CLINICAL RELEVANCE Retreatment of mature permanent teeth with apical periodontitis using regenerative endodontic procedures (REPs) is a new and promising approach. REPs with platelet-rich fibrin (PRF) and revascularization techniques provided high and comparable clinical and radiographic success rates.
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Affiliation(s)
- Norhan Khaled Omar Wahba
- Demonstrator of Paediatric and Community Dentistry, Faculty of Oral and Dental Medicine, Nahda University, New Bani Suef, Egypt
| | - Sherif Shafik E L Bahnasy
- Lecturer of Oral Radiology, Faculty of Dentistry, The British University in Egypt, Al Shorouk City, Egypt
| | - Yassmin Mohamed ElMakawi
- Lecturer of Paediatric and Community Dentistry, Faculty of Oral and Dental Medicine, Nahda University, New Bani Suef, Egypt
| | - Paul M H Dummer
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Venkateshbabu Nagendrababu
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | | | - Francesc Abella Sans
- Department of Endodontics, School of Dentistry, Universitat International de Catalunya, Sant Cugat del Valles, Barcelona, Spain
| | - Damiano Pasqualini
- Department of Surgical Sciences, Dental School, University of Turin, Turin, Italy
| | - Mario Alovisi
- Department of Surgical Sciences, Dental School, University of Turin, Turin, Italy
| | - Mohammed Turky
- Department of Endodontics, Faculty of Dentistry, Minia University, Minia, Egypt
- Department of Endodontics, Faculty of Dentistry, Sphinx University, Assiut, Egypt
| | - Eman Farouk Ahmed
- Microbiology and Immunology Department, Faculty of Pharmacy, Sohag University, Sohag, 82524, Province, Egypt
| | - Ahmad Abdel Hamid Elheeny
- Paediatric and Community Dentistry, Faculty of Dentistry, Minia University, Province, 61519, Minya, Egypt.
- Paediatric and Community Dentistry, Faculty of Dentistry, Sphinx University, Asyut Al Gadida City, Egypt.
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Barton B, Jamieson S, Del Santo M, Vich ML, Liu D, Yadav S, Mehta SY. Long-term assessment of skeletal and dental asymmetry after conventional and mini-implant-assisted rapid palatal expansion. Am J Orthod Dentofacial Orthop 2025; 167:399-408.e1. [PMID: 39674931 DOI: 10.1016/j.ajodo.2024.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 09/19/2024] [Accepted: 10/27/2024] [Indexed: 12/17/2024]
Abstract
INTRODUCTION This study aimed to evaluate the short-term and long-term skeletal and dental asymmetry with miniscrew-assisted rapid palatal expansion (MARPE), rapid palatal expansion (RPE), and control group using cone-beam computed tomography (CBCT) analysis. METHODS A total of 180 CBCT scans were analyzed for 60 patients divided into 3 groups: MARPE (mean age 13.7 ± 1.74 years), RPE (mean age 13.9 ± 1.14 years), and control (mean age 13.3 ± 1.49 years). CBCT scans were recorded at 3 points: pretreatment (T1), postexpansion (T2), and posttreatment (T3). The anterior nasal spine, posterior nasal spine, zygomaticomaxillary point, anterior nasal cavity width, posterior nasal cavity width (PNCW), external maxillary width, palatal width, and molar inclination were measured on the left and right sides in all CBCT scans. In addition, maxillary molar width (MMW) and maxillary canine width were also evaluated on the left and right sides. Statistical analysis was performed, and the parameters were tested within the groups from T1 to T2 and T1 to T3 using a paired t test. The mean changes were then compared among the 3 groups by a mixed analysis of variance test. RESULTS The RPE group showed significantly greater MMW on the left and right sides at T2 (P <0.05). MARPE and RPE led to a significant increase in the anterior nasal spine (right and left), zygomaticomaxillary point (right and left), anterior nasal cavity width (right and left), PNCW (right and left), external maxillary width (right and left), palatal width (right and left), MMW (right and left), maxillary canine width (right and left), and posterior nasal spine (left) at T2 compared with control (P <0.05). RPE led to a significant increase in the molar inclination (right and left) compared with MARPE and controls at T2. In the long term, the PNCW (right and left) was greater in MARPE compared with RPE and controls (P <0.05). CONCLUSIONS Within-group comparisons showed that there was no significant asymmetry in the MARPE and control group in the short and long term. The asymmetry for the RPE group was isolated to the MMW in the short term but not observed in the long term, and the magnitude of the asymmetry was clinically not significant.
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Affiliation(s)
| | | | - Marinho Del Santo
- Departments of Developmental Sciences and Orthodontics, School of Dentistry, Marquette University, Milwaukee, Wis
| | | | - Dawei Liu
- Departments of Developmental Sciences and Orthodontics, School of Dentistry, Marquette University, Milwaukee, Wis
| | - Sumit Yadav
- Henry and Anne Cech Professor of Orthodontics, University of Nebraska Medical Center College of Dentistry and Children's Hospital and Medical Center, Lincoln, Nebr
| | - Shivam Yogesh Mehta
- Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, Tex.
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Chen K, Chen Y, Chen P, Jiang J, Wang E, Guo C, Xu X. Is cone beam computed tomography accurate in predicting inferior alveolar nerve exposure during mandibular third molar extraction? BMC Oral Health 2025; 25:353. [PMID: 40055692 PMCID: PMC11887256 DOI: 10.1186/s12903-025-05716-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2024] [Accepted: 02/24/2025] [Indexed: 05/13/2025] Open
Abstract
OBJECTIVES This study aims to evaluate the accuracy of cone beam computed tomography (CBCT) in predicting the exposure of inferior alveolar nerve (IAN) during complicated mandibular third molars (M3M) extraction. METHODS 115 M3Ms with canal cortical defect signs on preoperative CBCT were extracted. Candidate variables included sex, age, types of CBCT machine, the Winter classification of M3Ms, the size of root entering the canal on CBCT, the size of cortical defect on CBCT. The primary outcome was the exposure of IAN and the exposed neurovascular bundle size which was recorded measured under endoscope. The independent sample t-test, Bland-Altman analysis was performed to assess the agreement between the CBCT and endoscopic measurements. The regression analysis was performed to determine if there was a correlation between the measurements of CBCT and endoscope. The Chi-square test was used to evaluate whether the proportion of IAN exposure in different impacted M3M types were consistent. ANOVA was used to test the correlation between the actual size of exposed IAN and (1) Winter classification types; (2) types of CBCT machine. RESULTS 85/115 (73.9%) M3Ms with canal cortical defect signs on preoperative CBCT had intraoperative exposure of IAN. The average length and width of the exposed IAN were 5.89 ± 1.72 mm and 2.48 ± 0.79 mm, which were significantly smaller than the size of root entering the canal on CBCT (9.69 ± 3.05 mm and 3.26 ± 0.87 mm, P < 0.001) but larger than the cortical defect size (5.06 ± 2.05 mm and 2.10 ± 0.54 mm, P < 0.05). The regression analysis showed that IAN exposure was significantly associated with the cortical defect length (0.1 mm) on CBCT (OR = 1.38, P = 0.001). The probability of intraoperative IAN exposure was statistically different among different Winter classifications of M3M and the probability of IAN exposure was higher in non-horizontal impacted type according to Chi-square test results. ANOVA showed statistical difference between exposed IAN length and Winter classification types (p = 0.001). CONCLUSIONS Not all M3Ms with tooth-IAN contact signs on preoperative CBCT indicated intraoperative IAN exposure. The size of root entering the canal on CBCT were mostly larger than the intraoperative endoscopic measurements. IAN exposure can be accurately predicted by the length of cortical defect on CBCT. Non-horizontal impaction predisposed the M3M to a higher risk of intraoperative IAN exposure. CLINICAL RELEVANCE Endoscope provides the possibility to observe and record the IAN exposure directly. IAN exposure can be accurately predicted by the length of cortical defect instead of the size of root entering the canal on CBCT. Non-horizontal impaction predisposed the M3M to a higher risk of intraoperative IAN exposure. CLINICAL TRIAL NUMBER Not applicable.
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Affiliation(s)
- Kenan Chen
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry, Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, P.R. China
| | - Youbai Chen
- Department of Plastic and Reconstructive Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing, P.R. China
| | - Peng Chen
- Department of Oral and Maxillofacial Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing, P.R. China
| | - Junqi Jiang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry, Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, P.R. China
| | - Enbo Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry, Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, P.R. China
| | - Chuanbin Guo
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry, Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, P.R. China
| | - Xiangliang Xu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry, Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, P.R. China.
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Raj G, Raj M, Saigo L. Accuracy of conventional versus cone-beam CT-synthesised lateral cephalograms for cephalometric analysis: A systematic review. J Orthod 2024; 51:160-176. [PMID: 37340975 DOI: 10.1177/14653125231178038] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
OBJECTIVE To assess the accuracy of cone-beam computed tomography (CBCT)-synthesised lateral cephalograms (CSLCs) compared with conventional lateral cephalograms for cephalometric analysis in human participants and skull models. METHODS The authors performed a search of PubMed, Scopus, Google Scholar and Embase databases on 4 October 2021. Included studies met the following criteria: published in English; compared conventional lateral cephalograms and CSLCs; assessed hard- and soft-tissue landmarks; and were performed on human or skull models. Data extraction from eligible studies was performed by two independent reviewers. The quality of evidence was assessed using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist tool - diagnostic accuracy studies. RESULTS A total of 20 eligible articles were included in this systematic review. Of these 20 studies, 17 presented with a low risk of bias, while three were found to have a moderate risk of bias. Hard- and soft-tissue analyses were evaluated for each imaging modality. The findings reveal that CSLCs are accurate and comparable to conventional lateral cephalograms for cephalometric analysis and demonstrate good inter-observer reliability. Four studies reported a higher accuracy with CSLCs. CONCLUSION Overall, the diagnostic accuracy and reproducibility of CSLCs were comparable to conventional lateral cephalograms in cephalometric analysis. It is justified that patients who have an existing CBCT scan do not need an additional lateral cephalogram, minimising unnecessary radiation exposure, expenses and time for the patient. Larger voxel sizes and low-dose CBCT protocols can be considered to minimise radiation exposure. REGISTRATION This study was registered with PROSPERO (CRD42021282019).
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Affiliation(s)
- Grace Raj
- National Dental Centre Singapore, Singapore
| | - Mary Raj
- National Dental Centre Singapore, Singapore
| | - Leonardo Saigo
- Department of Oral & Maxillofacial Surgery, National Dental Centre Singapore, Singapore
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Fok MR, Jin L. Learn, unlearn, and relearn post-extraction alveolar socket healing: Evolving knowledge and practices. J Dent 2024; 145:104986. [PMID: 38574844 DOI: 10.1016/j.jdent.2024.104986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/31/2024] [Accepted: 04/02/2024] [Indexed: 04/06/2024] Open
Abstract
OBJECTIVE This review was to offer a comprehensive analysis of currently available evidence on post-extraction alveolar socket healing, including i) the histological and molecular events during alveolar socket healing, ii) the dimensional ridge alterations after socket healing and controversies relating to sinus pneumatisation, iii) the patient-specific factors, procedural elements, and site-related variables influencing socket healing, iv) techniques and effectiveness of alveolar ridge preservation (ARP) procedure, and v) the philosophies and cost-effectiveness of ARP in clinical practice. SOURCES AND STUDY SELECTION To investigate the dimensional profiles of the alveolar ridge following unassisted healing, an overview of systematic reviews was conducted in February 2024 by two independent reviewers. Four electronic databases were searched in Pubmed, Embase, Web of science and Cochrane Library between 2004 and 2024 to identify all relevant systematic reviews on post-extraction healing. A further manual search of reviews was also conducted. The articles were further reviewed in full text for relevance. The AMSTAR-2 appraisal tool was adopted to assess methodological quality. Current research pertaining to other listed objectives was objectively analysed in narration. DATA 11 out of 459 retrieved studies were selected and ultimately covered in this review on the dimensional changes of alveolar ridge following natural healing: Seven systematic reviews and four systematic reviews with meta-analyses. The methodological quality of all included reviews was critically low. CONCLUSION This review thoroughly examines the healing profiles of post-extraction alveolar sockets and highlights the dynamic process with overlapping phases and the inter-individual variability in outcomes. ARP procedure is a potential strategy for facilitating prosthetic site development, while the current evidence is limited. Herein, an individualised and prosthetically driven approach is crucial. Further well sized and designed trials with novel biomaterials need to be undertaken, and the role of artificial intelligence in predicting healing and assisting clinical decision-making could be explored. CLINICAL SIGNIFICANCE By advancing our understanding of alveolar socket healing and its management strategies, clinicians can make more informed decisions regarding patient and site level assessment and selection, surgical techniques, and biomaterial choices, ultimately contributing to the enhanced healing process with reduced complications and improved quality of life for patients undergoing tooth extraction and dental implant treatments.
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Affiliation(s)
- Melissa Rachel Fok
- Division of Periodontology and Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, PR China.
| | - Lijian Jin
- Division of Periodontology and Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, PR China
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Vîrlan MJR, Nimigean V, Păun DL, Bisoc A, Nimigean VR. Modifications of the articular eminence inclination in association with the loss of occlusal support in the molar area. A cone-beam computed tomography study. ROMANIAN JOURNAL OF MORPHOLOGY AND EMBRYOLOGY = REVUE ROUMAINE DE MORPHOLOGIE ET EMBRYOLOGIE 2024; 65:297-307. [PMID: 39020545 PMCID: PMC11384045 DOI: 10.47162/rjme.65.2.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2024]
Abstract
The articular eminence (AE) is part of the temporal component of the temporomandibular joint (TMJ). The inclination of the AE (AEI) has an important role in TMJ biodynamics, influencing the path of movement of the disc-condyle complex. Although AEI values might change due to tooth loss, little is known about what effect could have the loss of occlusal support in the molar area on AE morphology. AEI was measured on cone-beam computed tomography (CBCT) images of 41 patients (82 TMJs) with or without occlusal support in the molar region. The patients included in this study were divided into four groups: (1) patients with maintained occlusal support in the molar areas on both sides (right and left side) (MM); (2) patients with loss of occlusal support in the molar areas on both sides (right and left side) (LL); (3) patients with loss of occlusal support in the molar area only on the right side, but with maintained occlusal support on the left molar area (LM); (4) patients with loss of occlusal support in the molar area only on the left side, but with maintained occlusal support in the right molar area (ML). AEI values were higher in the TMJs on the side with maintained occlusal support in the molar area (M) than the AEI values measured in TMJs from the side with loss of occlusal support in the molar area (L). AEI values on the right side were higher in the MM patients in comparison to the AEI values on the right side of LL patients. The loss of occlusal support in the molar areas changes the mandibular biodynamics, which might be reflected in the morphological changes at the AE level, where it might cause flattening of the articular slope predominantly on the right side.
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Affiliation(s)
- Maria Justina Roxana Vîrlan
- Department of Anatomy, Faculty of Dentistry, Department of Endocrinology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; ;
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Alfailany DT, Shaweesh AI, Hajeer MY, Brad B, Alhaffar JB. The diagnostic accuracy of cone-beam computed tomography and two-dimensional imaging methods in the 3D localization and assessment of maxillary impacted canines compared to the gold standard in-vivo readings: A cross-sectional study. Int Orthod 2023; 21:100780. [PMID: 37290351 DOI: 10.1016/j.ortho.2023.100780] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/18/2023] [Accepted: 05/20/2023] [Indexed: 06/10/2023]
Abstract
BACKGROUND Although the widespread cone-beam computed tomography (CBCT) is a diagnosing tool for impacted canines, the surgical exposure-based diagnostic accuracy of this 3D imaging modality has not been established yet. Therefore this study aimed to (1) compare the accuracy of CBCT- and 2D-based interpretations of impacted canine and its relationships with the neighbouring structures with the gold standard (GS) readings, (2) and calculate the diagnostic accuracy, sensitivity, and specificity values of the variables assessed using CBCT and 2D methods. MATERIAL AND METHODS Patients with unilateral impacted maxillary canines (IMCs) planned for surgical extraction between 2016-2018 were checked in-depth to include in this cross-sectional study. For each patient, 2D and 3D radiographic records were obtained and assessed by eight postgraduate orthodontic students. These assessments were compared with the GS readings based on surgical exposure and direct vision of the IMCs. To compare 2D- and CBCT-based assessments with the GS values, Cochran's Q tests, Friedman's tests, McNemar's, McNemar-Bowker's, and Wilcoxon tests were applied. RESULTS A total of 17 patients (6 males, 11 females; mean age: 20.52±3.98 years) were randomly selected and included in this study. Significant differences were found between the CBCT-based assessments and the GS only concerning shape and bony coverage of the IMC (P=0.001 and P<0.001, respectively). On the contrary, there were significant differences between the 2D-based assessments and the GS regarding all the assessed variables except for the ankylosis and the proximity to the adjacent teeth (P=0.424, and P=0.080, respectively). CBCT-based assessments had remarkably higher values of diagnostic accuracy, sensitivity, and specificity compared to 2D-based ones. CONCLUSIONS The diagnostic accuracy of CBCT outperformed 2D radiography in localizing the IMC (labiopalatal, mesiodistal, and vertical location), detecting root apex development of the IMCs, and the resorption of the adjacent incisors. Although both 2D and 3D techniques showed the same ability in the diagnosis of IMCs ankylosis, the diagnostic accuracy of CBCT was superior. However, both techniques inaccurately determined the shape of the impacted canine and the bony coverage.
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Affiliation(s)
| | - Ayman Ihsan Shaweesh
- Department of Oral and Maxillofacial Surgery, University of Damascus Faculty of Dentistry, Damascus, Syria
| | - Mohammad Younis Hajeer
- Department of Orthodontics, University of Damascus Faculty of Dentistry, Damascus, Syria.
| | - Bassel Brad
- Department of Oral and Maxillofacial Surgery, University of Damascus Faculty of Dentistry, Damascus, Syria
| | - Jacqueline Bashar Alhaffar
- Department of Oral and Maxillofacial Surgery, University of Damascus Faculty of Dentistry, Damascus, Syria
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R P, Durgekar SG. Evaluation of skeletal and dentoalveolar dimensions in patients with maxillary unilateral impacted canine: a cone beam computed tomographic study. Clin Oral Investig 2023:10.1007/s00784-023-05117-9. [PMID: 37358689 DOI: 10.1007/s00784-023-05117-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 06/08/2023] [Indexed: 06/27/2023]
Abstract
OBJECTIVE To assess the skeletal and dentoalveolar dimensions of subjects with the unilateral maxillary-impacted canine and compare it with the non-impacted side using cone beam computed tomography (CBCT). METHODS A split-mouth study that included 26 CBCTs (52 sides) with unilateral impacted canine was designed. The parameters analyzed were alveolar height; bucco palatal width at 2 mm, 6 mm, and 10 mm from alveolar crest; premolar width; lateral angulation of incisors; root length of lateral incisors; and crown-root angulation of lateral incisors. Obtained data were statistically analyzed by unpaired independent t-test. RESULTS The bucco palatal width at 2 mm and the premolar width from mid-palatal raphe were 1.22 mm and 1.71 mm less on the impacted side, respectively; the central and lateral incisor angulations were less by 3.69 degrees and 3.40 degrees, respectively, on the impacted side; the lateral incisor root length was 2.8 mm shorter on the impacted side; the crown-root angulation for lateral incisor was 2.4 degrees more on the impacted side. CONCLUSION The following conclusions can be drawn: (1) The premolar width is less on the impacted side. (2) The incisors are more distally angulated on the impacted side. (3) The crown-root angulation of the lateral incisor is mesially directed on the impacted side. CLINICAL RELEVANCE Asymmetric arch expansions should be undertaken in severe transverse asymmetries. In the beginning stages of treatment, the arch alignment, excluding incisors, must be undertaken to safeguard the roots of incisors.
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Affiliation(s)
- Prashanth R
- Department of Orthodontics and Dentofacial Orthopaedics, KLE Society's Institute of Dental Sciences, Yeshwanthpur Suburb, Bengaluru, Karnataka, 560022, India
- , 50, Sundar Raj Nagar, Subramanipuram, Trichy, Tamil Nadu, 620020, India
| | - Sujala Ganapati Durgekar
- Department of Orthodontics and Dentofacial Orthopaedics, KLE Society's Institute of Dental Sciences, Yeshwanthpur Suburb, Bengaluru, Karnataka, 560022, India.
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Block MS. How to Avoid Errors When Using Navigation to Place Implants - A Narrative Review. J Oral Maxillofac Surg 2023; 81:299-307. [PMID: 36481276 DOI: 10.1016/j.joms.2022.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/18/2022] [Accepted: 11/06/2022] [Indexed: 12/12/2022]
Abstract
PURPOSE Surgeons placing implants use navigation for implant placement accuracy. The importance of this review is to document the sources of error that are involved with navigation so surgeons can recognize factors to decrease error. The objective is to provide surgeons with a reference to optimize navigation. METHODS Pubmed.gov was the information source. Years reviewed included 2010 to 2022. The inclusion criteria included only articles in peer-reviewed journals. In vitro results were included only if they involved testing of variables microgap, cone beam computerized tomography (CBCT) accuracy evaluation, or accuracy of printed models. Variables were searched and evaluated. Data collected included the objectives and outcomes of the study including statistical significance. The conclusions made by the authors were confirmed by evaluating the data analysis, and then these conclusions were listed in each error-related topic. RESULTS The search used terms which included guided implant surgery complications (n = 4,029), accuracy of CBCT scanners (n = 319), accuracy of implant navigation (n = 983), and the error between drills and static guides (n = 3). From this search, 70 articles were collated that satisfied the inclusion criteria. There are multiple sources of error that are less than 1 mm, including but not limited to errors associated with the scanner and method for scanning, errors associated with merging scanned files with the CBCT scan, errors using different guide stent fabrication methods, errors associated with intraoperative techniques, the learning curve, and planning error. If small errors are not taken into consideration, implant placement errors can exceed 1-2 mm of platform location and angulation errors in excess of 8°. CONCLUSION The surgeon needs to take into consideration controllable factors that will result in the avoidance of implant malposition and thus be able to effectively utilize navigation for accurate implant placement.
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Affiliation(s)
- Michael S Block
- Private Practice, Metairie, LA, Clinical Professor, LSU School of Dentistry, Department of Oral and Maxillofacial Surgery, Metairie, LA.
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Turkyilmaz I, Gavras JN. Fabrication of immediately loaded implant-retained maxillary overdenture with flapless surgery using a CAD/CAM surgical guide: A technical report. Prim Dent J 2022; 11:61-65. [PMID: 36533372 DOI: 10.1177/20501684221133418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
This report describes a digital workflow and two-year follow-up of an immediately loaded implant-retained overdenture using flapless surgery and a computer-aided design/computer-aided manufacturing (CAD/CAM) surgical guide. A prosthetically-driven approach, utilising a three-dimensional (3D) planning software and a CAD/CAM surgical guide, was used to place four implants in the edentulous maxillary arch of a 59-year-old male patient. All four implants were inserted through the surgical guide without raising soft tissue flaps. After placement, the patient was delivered an immediately loaded maxillary overdenture. Surgical implant placement was well tolerated by the patient, who reported no discomfort. Following a four-month period, a new implant-retained maxillary overdenture reinforced by a metal framework was fabricated and delivered to the patient. There were no adverse issues noted with neither the implants nor the maxillary overdenture during the two-year follow up period. The technique using the workflow described in this report may be a predictable and affordable alternative in the restoration of edentulous arches as compared to full-arch fixed restorations.
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Affiliation(s)
- Ilser Turkyilmaz
- Professor, New York University College of Dentistry, Department of Prosthodontics, New York, USA
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Ahn J, Nguyen TP, Kim YJ, Kim T, Yoon J. Automated analysis of three-dimensional CBCT images taken in natural head position that combines facial profile processing and multiple deep-learning models. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2022; 226:107123. [PMID: 36156440 DOI: 10.1016/j.cmpb.2022.107123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 08/24/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND AND OBJECTIVES Analyzing three-dimensional cone beam computed tomography (CBCT) images has become an indispensable procedure for diagnosis and treatment planning of orthodontic patients. Artificial intelligence, especially deep-learning techniques for analyzing image data, shows great potential for medical and dental image analysis and diagnosis. To explore the feasibility of automating measurement of 13 geometric parameters from three-dimensional cone beam computed tomography images taken in natural head position (NHP), this study proposed a smart system that combined a facial profile analysis algorithm with deep-learning models. MATERIALS AND METHODS Using multiple views extracted from the cone beam computed tomography data of 170 cases as a dataset, our proposed method automatically calculated 13 dental parameters by partitioning, detecting regions of interest, and extracting the facial profile. Subsequently, Mask-RCNN, a trained decentralized convolutional neural network was applied to detect 23 landmarks. All the techniques were integrated into a software application with a graphical user interface designed for user convenience. To demonstrate the system's ability to replace human experts, 30 CBCT data were selected for validation. Two orthodontists and one advanced general dentist located required landmarks by using a commercial dental program. The differences between manual and developed methods were calculated and reported as the errors. RESULTS The intraclass correlation coefficients (ICCs) and 95% confidence interval (95% CI) for intra-observer reliability were 0.98 (0.97-0.99) for observer 1; 0.95 (0.93-0.97) for observer 2; 0.98 (0.97-0.99) for observer 3 after measuring 13 parameters two times at two weeks interval. The combined ICC for intra-observer reliability was 0.97. The ICCs and 95% CI for inter-observer reliability were 0.94 (0.91-0.97). The mean absolute value of deviation was around 1 mm for the length parameters, and smaller than 2° for angle parameters. Furthermore, ANOVA test demonstrated the consistency between the measurements of the proposed method and those of human experts statistically (Fdis=2.68, ɑ=0.05). CONCLUSIONS The proposed system demonstrated the high consistency with the manual measurements of human experts and its applicability. This method aimed to help human experts save time and efforts for analyzing three-dimensional CBCT images of orthodontic patients.
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Affiliation(s)
- Janghoon Ahn
- Department of Orthodontics, Kangnam Sacred Heart Hospital, Hallym University, Singil-ro 1 gil, Yeongdeungpo-gu, Seoul 07441, Republic of Korea
| | - Thong Phi Nguyen
- Department of Mechanical Design Engineering/ Major in Materials, Devices, and Equipment, Hanyang University, 222, Wangsimni-ro, Seongdongsu, Seoul 04763, Republic of Korea; BK21 FOUR ERICA-ACE Centre, Hanyang University, Ansan-si, Gyeonggi-do 15588, Republic of Korea
| | - Yoon-Ji Kim
- Department of Orthodontics, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505 Republic of Korea
| | - Taeyong Kim
- Department of Advanced General Dentistry, Kangnam Sacred Heart Hospital, Hallym University, Singil-ro 1-gil, Yeongdeungpo-gu, Seoul 07441, Republic of Korea
| | - Jonghun Yoon
- Department of Mechanical Engineering, Hanyang University, 55, Hanyangdaehak-ro, Sangnok-gu, Ansan-si, Gyeonggi-do 15588, Republic of Korea; BK21 FOUR ERICA-ACE Centre, Hanyang University, Ansan-si, Gyeonggi-do 15588, Republic of Korea.
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Mehta S, Wang D, Upadhyay M, Vich ML, Yadav S. Long-term effects on alveolar bone with bone-anchored and tooth-anchored rapid palatal expansion. Am J Orthod Dentofacial Orthop 2022; 161:519-528. [PMID: 35272886 DOI: 10.1016/j.ajodo.2020.10.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 10/01/2020] [Accepted: 10/01/2020] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate the long-term effects of bone-anchored and tooth-anchored expansion appliances on alveolar bone in vertical and horizontal dimensions, compared with controls, using cone-beam computed tomography. METHODS We evaluated 180 cone-beam computed tomography scans for 60 patients at 3-time points: T1 (pretreatment), T2 (postexpansion), and T3 (posttreatment), for 3 groups: bone-anchored expansion appliance (BA), tooth-anchored expansion appliance (TA), and controls (T1-T3: BA, 2 years 8 months; TA, 2 years 9 months; control: 2 years 7 months). The intermolar width, molar angulation, palatal width, vertical buccal bone height, buccal bone thickness at the alveolar crest, and root apex were measured in the 3 groups at different time points. RESULTS In the short term, both BA and TA led to a statistically significant increase in the intermolar width and vertical buccal bone loss after expansion compared with controls. Vertical buccal bone loss was significantly greater in TA than in BA. In addition, TA led to significantly increased molar angulation (buccal tipping) compared with controls at T2. There were no significant differences in the 3 groups in the long term except vertical buccal bone loss, which was significantly greater in TA than controls. A substantial correlation was found between molar angulation and vertical buccal bone loss, and a moderate negative correlation was found between intermolar width and buccal bone thickness at the alveolar crest at T3. CONCLUSIONS There was no difference in the treatment outcomes between the 3 groups in the long term except vertical buccal bone loss, which was significantly increased in the TA group compared with controls.
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Affiliation(s)
- Shivam Mehta
- Department of Developmental Sciences/Orthodontics, Marquette University School of Dentistry, Milwaukee, Wis
| | - Dennis Wang
- Division of Orthodontics, University of Connecticut Health, Farmington, Conn
| | - Madhur Upadhyay
- Division of Orthodontics, University of Connecticut Health, Farmington, Conn
| | | | - Sumit Yadav
- Division of Orthodontics, University of Connecticut Health, Farmington, Conn.
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Hamza MK, Shantha AM, Ashwathappa DT, Rajanna S, Puttegowda AK. Assessing the Articular Eminence Asymmetry in Dentate, Partially Edentulous and Edentulous patients Using Cone-Beam Ct. J Pharm Bioallied Sci 2021; 13:S667-S671. [PMID: 34447177 PMCID: PMC8375791 DOI: 10.4103/jpbs.jpbs_685_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/27/2020] [Indexed: 11/09/2022] Open
Abstract
Background and Objectives: The relationship between the articular eminence (AE) inclination and masticatory system in the biomechanics of temporomandibular joint (TMJ) is defined by the degree with normal values of 30°–60° obtained between the posterior wall of the AE and a horizontal reference plane. The purpose of this study was to assess the asymmetry of the AE in dentate, partially edentulous, and edentulous patients using cone-beam computed tomography (CBCT) imaging and to compare the determined asymmetry in the dentulous with partially and completely edentulous patients. Materials and Methods: CBCT images of 120 TMJ joints in sixty patients were evaluated. AE inclination and height values were traced on the central sagittal slice of right and left TMJ. The patients were grouped as dentate, partially edentulous, and edentulous with an age range of 20–80 years. Statistical analysis included student's paired and independent t-test, analysis of variance, and Tukey's post hoc test, and P < 0.05 was considered statistically significant. Results: AE inclination revealed highest value in dentate patients (60.98 ± 5.42) followed by partially edentulous (53.40 ± 7.91) and lowest in the edentulous patients (51.43 ± 3.63). P < 0.001 was statistically significant between these groups. Conclusion: The results obtained in the present study showed steep inclination of AE in dentate followed by partially edentulous and edentulous subjects. No significant differences among the age, gender, and sides were found.
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Affiliation(s)
- Mushtaq Kose Hamza
- Department of Oral Medicine and Radiology, V S Dental College and Hospital, Bengaluru, Karnataka, India
| | | | | | - Shobha Rajanna
- Department of Periodontics, M R Ambedkar Dental College and Hospital, Bengaluru, Karnataka, India
| | - Arun Khondapura Puttegowda
- Department of Oral and Maxillofacial Surgery, Raja Rajeshwari Dental College and Hospital, Bengaluru, Karnataka, India
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JIANG PAN, BAI YUXING, HU FEI, ZHANG XUEYANG, YANG QUN, YANG FANQIAO, MA YAO, LIANG JIADI. THREE-DIMENSIONAL ASSESSMENT OF THE SAGITTAL CONDYLAR INCLINATION IN SKELETAL CLASS II PATIENTS BASED ON COMPUTER AIDED DIAGNOSIS AXIOGRAPH AND CONE-BEAM COMPUTED TOMOGRAPHY. J MECH MED BIOL 2021. [DOI: 10.1142/s0219519421400169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Great variation has been found in sagittal condylar inclination (SCI) values among individuals with different skeletal structures. Therefore, average value articulators cannot fully represent the physiological characteristics of the mandible, or reproduce its sagittal movements. The purpose of this study was to measure the SCI value of skeletal Class II patients by two different three-dimensional assessments, and to evaluate the correlation and consistency between the two methods. A total of 23 patients (aged 15–65 years) diagnosed with skeletal Class II malocclusion were recruited from the Stomatological Center of Shunde Hospital, Southern Medical University. Subjects were divided into three groups based on different A point–nasion–B point angle (ANB), and angle between the upper central incisor and Frankfort horizontal plane (U1-FH). Bilateral SCI values were measured using computer-aided diagnosis axiography (CADIAX) and cone-beam computed tomography (CBCT). Statistical analysis showed that the SCI value measured by CADIAX was significantly higher than that measured by CBCT. Significant differences were found among different ANB and U1-FH groups, and the average value of the [Formula: see text] group was the highest. Our findings indicate that the measurement of SCI by CADIAX cannot be replaced by CBCT, and it is recommended that personalized measurements of SCI values in skeletal class II patients be carried out. Individual SCI measurement can help coordinate the physiological characteristics of patients in dental treatment, benefit the health of temporomandibular joint and improve the long-term outcome. Our results suggest that the SCI values obtained by CBCT is different from the real SCI values of patients, and we will look for a simpler and more accurate clinical method to measure SCI value in future research.
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Affiliation(s)
- PAN JIANG
- Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, P. R. China
| | - YUXING BAI
- Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, P. R. China
| | - FEI HU
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, P. R. China
| | - XUEYANG ZHANG
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, P. R. China
| | - QUN YANG
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, P. R. China
| | - FANQIAO YANG
- Shunde Hospital of Southern Medical University, Foshan 528300, P. R. China
| | - YAO MA
- Shunde Hospital of Southern Medical University, Foshan 528300, P. R. China
| | - JIADI LIANG
- Shunde Hospital of Southern Medical University, Foshan 528300, P. R. China
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Reliability and accuracy of automatic segmentation of mandibular 3D models on linear measurements. Clin Oral Investig 2021; 25:6335-6346. [PMID: 33954849 DOI: 10.1007/s00784-021-03934-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 03/30/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Evaluate if automatic segmentation of mandibular three-dimensional (3D) models is reliable and accurate. MATERIALS AND METHODS Eight dry mandibles with eight silica markers were scanned in the i-CAT Classic device (Imaging Sciences International). Automatic segmentation was performed using nine standard preset thresholds in the Dolphin software (Dolphin Imaging & Management Solutions). Three observers individually made twice eight linear measurements on the mandibular 3D models. Another observer made physical measurements, twice as well, on the dry mandibles. Reliability and accuracy were evaluated with intraclass correlation coefficients (ICCs), Dahlberg's formula, Bland-Altman analyses, and changing bias with regression analyses. RESULTS Inter-observer and intra-observer ICCs and Dahlberg's error were ≥ 0.75 and ≤ 1.0 mm, respectively, for all measurements. Inter-observer agreement between mandibular 3D models and physical measurements ranged from -0.37 to 0.91 mm. CONCLUSIONS Linear measurements made on mandibular 3D models obtained using standard preset thresholds are reliable and accurate. However, additional studies are necessary to confirm this hypothesis for clinical applications. CLINICAL RELEVANCE Since the 3D models are useful for diagnostics and surgical planning, it is necessary to determinate whether the linear measurements made on 3D models obtained by automatic segmentation are sufficiently reliable and accurate.
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Yousefi F, Shokri A, Farhadian M, Vafaei F, Forutan F. Accuracy of maxillofacial prototypes fabricated by different 3-dimensional printing technologies using multi-slice and cone-beam computed tomography. Imaging Sci Dent 2021; 51:41-47. [PMID: 33828960 PMCID: PMC8007396 DOI: 10.5624/isd.20200175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 10/27/2020] [Accepted: 11/06/2020] [Indexed: 11/18/2022] Open
Abstract
Purpose This study aimed to compare the accuracy of 3-dimensional (3D) printed models derived from multidetector computed tomography (MDCT) and cone-beam computed tomography (CBCT) systems with different fields of view (FOVs). Materials and Methods Five human dry mandibles were used to assess the accuracy of reconstructions of anatomical landmarks, bone defects, and intra-socket dimensions by 3D printers. The measurements were made on dry mandibles using a digital caliper (gold standard). The mandibles then underwent MDCT imaging. In addition, CBCT images were obtained using Cranex 3D and NewTom 3G scanners with 2 different FOVs. The images were transferred to two 3D printers, and the digital light processing (DLP) and fused deposition modeling (FDM) techniques were used to fabricate the 3D models, respectively. The same measurements were also made on the fabricated prototypes. The values measured on the 3D models were compared with the actual values, and the differences were analyzed using the paired t-test. Results The landmarks measured on prototypes fabricated using the FDM and DLP techniques based on all 4 imaging systems showed differences from the gold standard. No significant differences were noted between the FDM and DLP techniques. Conclusion The 3D printers were reliable systems for maxillofacial reconstruction. In this study, scanners with smaller voxels had the highest precision, and the DLP printer showed higher accuracy in reconstructing the maxillofacial landmarks. It seemed that 3D reconstructions of the anterior region were overestimated, while the reconstructions of intra-socket dimensions and implant holes were slightly underestimated.
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Affiliation(s)
- Faezeh Yousefi
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Abbas Shokri
- Dental Implant Research Center, Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Farhadian
- Department of Biostatistics, Dental Implants Research Center, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Fariborz Vafaei
- Department of Prosthodontics, Hamadan University of Medical Sciences, Hamadan, Iran
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Ghorai L, Asha ML, Raja J. Assessment of artifacts induced by various dental restorative materials on cone- beam computed tomography- An in vitro study. JOURNAL OF INDIAN ACADEMY OF ORAL MEDICINE AND RADIOLOGY 2021. [DOI: 10.4103/jiaomr.jiaomr_136_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Tao B, Shen Y, Sun Y, Huang W, Wang F, Wu Y. Comparative accuracy of cone-beam CT and conventional multislice computed tomography for real-time navigation in zygomatic implant surgery. Clin Implant Dent Relat Res 2020; 22:747-755. [PMID: 33112508 DOI: 10.1111/cid.12958] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/04/2020] [Accepted: 10/04/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cone-beam computed tomography (CBCT) and conventional multislice CT (MSCT) are both used in zygomatic implant navigation surgery but the superiority of one technique versus the other remains unclear. PURPOSE This study compared the accuracy of CBCT and MSCT in zygomatic implant navigation surgery by calculating the deviations of implants. MATERIAL AND METHODS Patients with severely atrophic maxillae were classified into two groups according to the use of CBCT- or MSCT-guided navigation system. The entry and apical distance deviation, and the angle deviation of zygomatic implants were measured on fused operation images. A linear effect model was used for analysis, with statistical significance set at P < .05. RESULTS A total of 72 zygomatic implants were inserted as planned in 23 patients. The comparison of deviations in CBCT and MSCT groups showed a mean (± SD) entry deviation of 1.69 ± 0.59 mm vs 2.04 ± 0.78 mm (P = .146), apical deviation of 2 ± 0.68 mm vs 2.55 ± 0.85 (P < .001), and angle deviation of 2.32 ± 1.02° vs 3.23 ± 1.21° (P = .038). CONCLUSION Real-time zygomatic implant navigation surgery with CBCT may result in higher values for accuracy than MSCT.
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Affiliation(s)
- Baoxin Tao
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yihan Shen
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yuanyuan Sun
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Wei Huang
- Department of Oral Implantology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Feng Wang
- Department of Oral Implantology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yiqun Wu
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
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Srebrzyńska-Witek A, Koszowski R, Różyło-Kalinowska I, Piskórz M. CBCT for estimation of the cemento-enamel junction and crestal bone of anterior teeth. Open Med (Wars) 2020; 15:774-781. [PMID: 33336035 PMCID: PMC7712091 DOI: 10.1515/med-2020-0211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 02/21/2020] [Accepted: 06/10/2020] [Indexed: 11/21/2022] Open
Abstract
The aim of the study is to evaluate the usefulness of cone-beam computed tomography (CBCT) in the assessment of the relationship between the cemento-enamel junction (CEJ) and bone crest of the anterior mandibular cortex. The study population comprised 39 males and 61 females, aged 18–71. A GENDEX GXCB-500 machine, i-CAT Vision and CorelDraw 9 software were used. The distances between the CEJ and bone crest at buccal and lingual sides of six anterior mandibular teeth were measured. Descriptive statistical methods, Student’s t-test and ANOVA were used. The mean distance between the bone crest and CEJ was 2.32 mm ± 0.78 mm at the buccal and 2.52 mm ± 0.85 mm at the lingual side. It was found that in males aged over 50 years, the mean distance at the buccal side was 2.84 mm ± 0.79 mm and was significantly higher than in males aged 49 and less – 2.08 mm ± 0.41 mm. The mean distance at the lingual side was 3.28 mm ± 1.08 mm and was significantly lower in the age group of 49 years and less – 2.10 mm ± 0.41 mm. CBCT allows determining the distance between the CEJ and crestal bone margin at buccal and lingual sides. The data provide crucial information for planning orthodontic treatment, implant placement and periodontal therapy.
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Affiliation(s)
| | - Rafał Koszowski
- Academic Center of Dentistry and Specialized Medicine , Pl. Akademicki 17, 41-902 , Bytom , Poland
| | - Ingrid Różyło-Kalinowska
- Department of Dental and Maxillofacial Radiology, Medical University of Lublin, Poland , Karmelicka Street 7, 20-081 , Lublin , Poland
| | - Magdalena Piskórz
- Department of Dental and Maxillofacial Radiology, Medical University of Lublin, Poland , Karmelicka Street 7, 20-081 , Lublin , Poland
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Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations. Processes (Basel) 2020. [DOI: 10.3390/pr8050525] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The paper is a comprehensive but compact review of the literature on the state of illnesses of the human stomatognathic system, related consequences in the form of dental deficiencies, and the resulting need for prosthetic treatment. Types of prosthetic restorations, including implants, as well as new classes of implantable devices called implant-scaffolds with a porous part integrated with a solid core, as well as biological engineering materials with the use of living cells, have been characterized. A review of works on current trends in the technical development of dental prosthetics aiding, called Dentistry 4.0, analogous to the concept of the highest stage of Industry 4.0 of the industrial revolution, has been presented. Authors’ own augmented holistic model of Industry 4.0 has been developed and presented. The studies on the significance of cone-beam computed tomography (CBCT) in planning prosthetic treatment, as well as in the design and manufacture of prosthetic restorations, have been described. The presented and fully digital approach is a radical turnaround in both clinical procedures and the technologies of implant preparation using computer-aided design and manufacturing methods (CAD/CAM) and additive manufacturing (AM) technologies, including selective laser sintering (SLS). The authors’ research illustrates the practical application of the Dentistry 4.0 approach for several types of prosthetic restorations. The development process of the modern approach is being observed all over the world. The use of the principles of the augmented holistic model of Industry 4.0 in advanced dental engineering indicates a change in the traditional relationship between a dentist and a dental engineer. The overall conclusion demonstrates that it is inevitable and extremely beneficial to implement the idea of Dentistry 4.0 following the assumptions of the authors’ own, holistic Industry 4.0 model.
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Pitale U, Mankad H, Pandey R, Pal PC, Dhakad S, Mittal A. Comparative evaluation of the precision of cone-beam computed tomography and surgical intervention in the determination of periodontal bone defects: A clinicoradiographic study. J Indian Soc Periodontol 2020; 24:127-134. [PMID: 32189840 PMCID: PMC7069118 DOI: 10.4103/jisp.jisp_118_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 10/25/2019] [Accepted: 12/22/2019] [Indexed: 11/04/2022] Open
Abstract
Context Major limitations of conventional radiography are overlapping and lack of 3D information. Surgical exposure, though being able to provide accurate information, provides very little time to plan-out the type of periodontal regeneration required during surgery. Cone Beam Computed Tomography (CBCT) has emerged as a feasible tool and found to be accurate. Unfortunately, in-vivo studies are still scarce. Aim Aim of the present study was to assess the efficacy of CBCT in the detection of periodontal bony defects while determining its quantitative precision in the measurement of alveolar bone height as against the open flap debridement (OFD) procedure which is set as the gold standard. Setting and Design Present study is a cross-sectional study. Materials and Methods The present study includes patients with Chronic Periodontitis indicated for periodontal surgeries. Bone defects were measured with the help of CBCT and with William's periodontal probe during surgical intervention and compared. Statistical Analysis Measurements were compared with Student's t-test; unpaired t-test & correlation were tested with Pearson's correlation coefficient test. P < 0.05 was considered statistically significant. Results The mean CBCT & surgical value of palatal/lingual & distal sites of anterior teeth showed statistically significant difference (P = 0.001). All the values for posterior teeth were statistically non-significant. Conclusion Statistically CBCT & clinical measurement with OFD have similar potential of accuracy to access the bony topography but CBCT provides good accessibility to visualize the sites which are difficult to access during surgical interventions like palatal sites & the distal sites of the posterior teeth.
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Affiliation(s)
- Unnati Pitale
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Hitesh Mankad
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Rohit Pandey
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Pritish Chandra Pal
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Shikha Dhakad
- Department of Periodontics, Chhattisgarh Dental College and Research Institute, Rajnandgaon, Chhattisgarh, India
| | - Antush Mittal
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
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Computational dosimetry in a pediatric i-CAT procedure using virtual anthropomorphic phantoms. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abdelkarim A. Cone-Beam Computed Tomography in Orthodontics. Dent J (Basel) 2019; 7:E89. [PMID: 31480667 PMCID: PMC6784482 DOI: 10.3390/dj7030089] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/05/2019] [Accepted: 08/09/2019] [Indexed: 12/15/2022] Open
Abstract
Unlike patients receiving implants or endodontic treatment, most orthodontic patients are children who are particularly sensitive to ionizing radiation. Cone-beam computed tomography (CBCT) carries risks and benefits in orthodontics. The principal risks and limitations include ionizing radiation, the presence of artifacts, higher cost, limited accessibility, and the need for additional training. However, this imaging modality has several recognized indications in orthodontics, such as the assessment of impacted and ectopic teeth, assessment of pharyngeal airway, assessment of mini-implant sites, evaluation of craniofacial abnormalities, evaluation of sinus anatomy or pathology, evaluation of root resorption, evaluation of the cortical bone plate, and orthognathic surgery planning and evaluation. CBCT is particularly justified when it brings a benefit to the patient or changes the outcome of the treatment when compared with conventional imaging techniques. Therefore, CBCT should be considered for clinical orthodontics for selected patients. Prescription of CBCT requires judicious and sound clinical judgment. The central question of this narrative review article is: when does CBCT add value to the practice of orthodontics? To answer this question, this article presents discussion on radiation dosage of CBCT and other imaging techniques used in orthodontics, limitations of CBCT in orthodontics, justifying the use of CBCT in orthodontics, and the benefits and evidence-based indications of CBCT in orthodontics. This review summarizes the central themes and topics in the literature regarding CBCT in orthodontics and presents ten orthodontic cases in which CBCT proved to be valuable.
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Affiliation(s)
- Ahmad Abdelkarim
- Department of Orthodontics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216, USA.
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Weiss R, Read-Fuller A. Cone Beam Computed Tomography in Oral and Maxillofacial Surgery: An Evidence-Based Review. Dent J (Basel) 2019; 7:dj7020052. [PMID: 31052495 PMCID: PMC6631689 DOI: 10.3390/dj7020052] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/09/2019] [Accepted: 04/11/2019] [Indexed: 12/24/2022] Open
Abstract
Cone Beam Computed Tomography (CBCT) is a valuable imaging technique in oral and maxillofacial surgery (OMS) that can help direct a surgeon’s approach to a variety of conditions. A 3-dimensional analysis of head and neck anatomy allows practitioners to plan appropriately, operate with confidence, and assess results post-operatively. CBCT imaging has clear indications and limitations. CBCT offers the clinician 3-dimensional and multi-planar views for a more accurate diagnosis and treatment without the financial burden and radiation exposure of conventional computed tomography (CT) scans. Furthermore, CBCT overcomes certain limitations of 2-dimensional imaging, such as distortion, magnification, and superimposition. However, CBCT lacks the detailed depiction of soft tissue conditions for evaluation of pathologic conditions, head and neck infections, and temporomandibular joint (TMJ) disc evaluation. This review evaluates the evidence-based research supporting the application of CBCT in the various fields of oral and maxillofacial surgery, including dentoalveolar surgery, dental implants, TMJ, orthognathic surgery, trauma, and pathology, and will assess the value of CBCT in pre-operative assessment, surgical planning, and post-operative analysis when applicable. Additionally, the significant limitations of CBCT and potential areas for future research will be discussed.
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Affiliation(s)
- Robert Weiss
- Department of Oral and Maxillofacial Surgery, Texas A&M University College of Dentistry, Dallas, TX 75246, USA.
- Baylor Scott and White Health, Baylor University Medical Center-Dallas, Dallas, TX 75246, USA.
| | - Andrew Read-Fuller
- Department of Oral and Maxillofacial Surgery, Texas A&M University College of Dentistry, Dallas, TX 75246, USA.
- Attending Physician, Baylor Scott and White Health, Baylor University Medical Center-Dallas, Dallas, TX 75246, USA.
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Akbulut A, Kılınç DD. Evaluation of condyle position in patients with Angle Class I, II, and III malocclusion using cone-beam computed tomography panoramic reconstructions. Oral Radiol 2018; 35:43-50. [PMID: 30484184 DOI: 10.1007/s11282-018-0326-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/10/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES This study was performed to compare the positions of the right and left condyles between male and female patients with different Angle malocclusions using cone-beam computed tomography (CBCT) panoramic reconstructions. METHODS The CBCT images of 60 patients (age of 18-37 years) were retrospectively evaluated. The patients were divided according to their Angle malocclusion classifications (Angle Classes I, II, and III). The condyle-to-eminence, condyle-to-fossa, and condyle-to-meatus distances were measured digitally using i-CAT software. RESULTS The left and right condyle-to-fossa distances were the most variable parameters among the Angle classes. The right condyle-to-eminence and right condyle-to-fossa distances were significantly different among the classes. Male patients seemed to have a greater condyle-to-fossa distance on the right side in both the Class I and III groups. The mean distance from the condyle to eminence, condyle to fossa, and condyle to meatus on the right side was the greatest in the Angle Class II group. CONCLUSIONS In all three types of malocclusion (Angle Classes I, II, and III), the condyles on both the right and left sides were not exactly symmetric or centrally located within the glenoid fossa. This work emphasizes the differences in the condyle position between male and female patients. Furthermore, the symmetry and centricity of the condyles are not dependent on the patient's sex or type of malocclusion.
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Affiliation(s)
- Aslıhan Akbulut
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Istanbul Medipol University, Atatürk Blv. No. 27, Unkapanı, Fatih, 34083, Istanbul, Turkey
| | - Delal Dara Kılınç
- Department of Orthodontics, Faculty of Dentistry, Istanbul Medipol University, Atatürk Blv. No. 27, Unkapanı, Fatih, 34083, Istanbul, Turkey.
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Atik E, Gorucu-Coskuner H, Akarsu-Guven B, Taner T. Evaluation of changes in the maxillary alveolar bone after incisor intrusion. Korean J Orthod 2018; 48:367-376. [PMID: 30450329 PMCID: PMC6234111 DOI: 10.4041/kjod.2018.48.6.367] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/12/2018] [Accepted: 04/21/2018] [Indexed: 12/02/2022] Open
Abstract
Objective This study was performed to investigate the changes in alveolar bone after maxillary incisor intrusion and to determine the related factors in deep-bite patients. Methods Fifty maxillary central incisors of 25 patients were evaluated retrospectively. The maxillary incisors in Group I (12 patients; mean age, 16.51 ± 1.32 years) were intruded with a base-arch, while those in Group II (13 patients; mean age, 17.47 ± 2.71 years) were intruded with miniscrews. Changes in the alveolar envelope were assessed using pre-intrusion and post-intrusion cone-beam computed tomography images. Labial, palatal, and total bone thicknesses were evaluated at the crestal (3 mm), midroot (6 mm), and apical (9 mm) levels. Buccal and palatal alveolar crestal height, buccal bone height, and the prevalence of dehiscence were evaluated. Two-way repeated measure ANOVA was used to determine the significance of the changes. Pearson's correlation coefficient analysis was performed to assess the relationship between dental and alveolar bone measurement changes. Results Upper incisor inclination and intrusion changes were significantly greater in Group II than in Group I. With treatment, the alveolar bone thickness at the labial bone thickness (LBT, 3 and 6 mm) decreased significantly in Group II (p < 0.001) as compared to Group I. The LBT change at 3 mm was strongly and positively correlated with the amount of upper incisor intrusion (r = 0.539; p = 0.005). Conclusions Change in the labial inclination and the amount of intrusion should be considered during upper incisor intrusion, as these factors increase the risk of alveolar bone loss.
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Affiliation(s)
- Ezgi Atik
- Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Hande Gorucu-Coskuner
- Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Bengisu Akarsu-Guven
- Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Tulin Taner
- Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Available bone morphology and status of neural structures in the mandibular interforaminal region: three-dimensional analysis of anatomical structures. Surg Radiol Anat 2018; 40:1243-1252. [PMID: 29766231 DOI: 10.1007/s00276-018-2039-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/11/2018] [Indexed: 10/16/2022]
Abstract
PURPOSE This study aimed to clarify the size and morphology of the mandible and to determine state of neural structures for the planning of the dental implantation using cone-beam computerized tomography (CBCT). METHODS Of the 252 patients, CBCT images of 48 selected patients were evaluated. The bone height and width were measured and the type of the mental portion of the inferior alveolar canal, the anterior loop length (ALL), the location of the incisive canal and lingual foramen were identified with cross-sectional and multiplane reformatted CBCT images. According to buccal and lingual concavities, the shape of the mandible is classified as type A, B and C. RESULTS Bone widths of males were significantly higher than female (p < 0.05). The thickest part of the alveolar bone was measured in the middle triple zone (d line) and the thinnest part was measured in the area near the alveolar crest (b line). The most seen type of mandible was type B (45.8%) that mandible was concave on the buccal side. Bone heights had a tendency to increase towards to the anterior mandible, and bone height in male patients was slightly but not significantly greater than that in female patients. ALL was 4.2 ± 1.2 mm and visible incisive canal length on CBCT was 9.7 ± 3.8 mm. CONCLUSION CBCT assessment of morphological features of the alveolar bone and locations of nerve canals and foramina in the anterior-premolar region of mandible represent useful practical anatomical information about the interforaminal region. This information is the guide to the dentist before implant surgery.
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Bayrak S, Halıcıoglu S, Kose G, Halıcıoglu K. Evaluation of the relationship between mandibular condyle cortication and chronologic age with cone beam computed tomography. J Forensic Leg Med 2018; 55:39-44. [PMID: 29459097 DOI: 10.1016/j.jflm.2018.02.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 02/07/2018] [Accepted: 02/11/2018] [Indexed: 10/18/2022]
Abstract
PURPOSE The aim of the present study is to evaluate the relationship between mandibular condyle cortication and chronologic age and gender via cone-beam computed tomography (CBCT) and to investigate the effectiveness of using the condylar cortication as a new method of age estimation. METHODS CBCT images from 433 subjects aged 8 to 31 years were included in this study. The right and left condyle cortication were assessed on the sagittal plane separately for each individual by the same investigator via a new method that describes the cortication of the condyle. Type I: There is no cortication on the condyle. Type II: The bone that is on the superior surface of the condyle is seen less density than the structures around the condyle. Type III: The surface of the condyle is seen similar or higher density than the surrounding cortical areas. RESULTS The type of the condyle cortication in the right and left mandible was similar for almost each subject and there was no statistically significant different between them (p = 0.375). When we evaluated the results without including these patients for male, Type I cortication of the condyle was seen at 14.14 ± 2.3 years, Type II cortication of the condyle was seen at 16.11 ± 3.18 years and Type III cortication of the condyle was seen at 19.39 ± 3.96 years. For the female, Type I cortication of the condyle was seen at 13.01 ± 2.16 years, Type II cortication of the condyle was seen at 15.52 ± 2.71 years and Type III cortication of the condyle was seen at 17.95 ± 3.13 years. The minimum age of Type III cortication was 11 and 15 years old for male and female, respectively. However, there are subjects, who are 30 year old man and 31 year old female, have no cortication as much as similar or higher than the surrounding the cortical areas. CONCLUSION This study is the first investigation of the relationship between condyle cortication and chronologic age with CBCT in the Turkish population. The type of cortication in the right and left condyle may be different for the same individual. Chronologic age increased as the stages of the cortication process from Type I to Type III in male and female individuals, and all the stages of the cortication in the mandibular condyle of male occur later time according to female.
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Affiliation(s)
- Seval Bayrak
- Abant Izzet Baysal University, Faculty of Dentistry, Department of Maxillofacial Radiology, Bolu, Turkey.
| | - Sıddıka Halıcıoglu
- Abant Izzet Baysal University, Faculty of Medicine, Department of Radiology, Bolu, Turkey
| | - Gülcan Kose
- Abant Izzet Baysal University, Faculty of Dentistry, Department of Orthodontics, Bolu, Turkey
| | - Koray Halıcıoglu
- Abant Izzet Baysal University, Faculty of Dentistry, Department of Orthodontics, Bolu, Turkey
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Scariot R, Gonsar B, Gill N, Furquim F, Corso PFCDL, Trevillato PC, Potluri A, Vieira AR. Mandibular condylar dimensions: Correlation between 3D tomography and dried skull measurements. Cranio 2017; 37:153-158. [PMID: 29216797 DOI: 10.1080/08869634.2017.1409169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Objective Compare the anatomical dimensions of mandibular condyles with the same CBCT measurements. Methods Four landmarks were identified on the condyles of dried skulls and are measured with their corresponding areas in CBCT images: Right Width of Condyle (RW), Left Width of Condyle (LW), Right Length of Condyle (RL), and Left Length of Condyle (LL). Results With respect to direct measurements on the dry skulls, statistically significant differences were found between sexes (p < 0.001). When the real values were compared with the CBCT, it was observed that the bias depends on the magnitude of the measurement. It means that there is an underestimation for smaller values and an overestimation for larger values. Conclusion CBCT is reliable imaging modality, but when compared real measures of condyle length are more reliable then width.
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Affiliation(s)
- Rafaela Scariot
- a Department of Maxillofacial Surgery , Positivo University , Curitiba , PR , Brazil
| | - Briana Gonsar
- b Department of Oral Biology , University of Pittsburgh , Pittsburgh , PA , USA
| | - Navenett Gill
- b Department of Oral Biology , University of Pittsburgh , Pittsburgh , PA , USA
| | - Fabio Furquim
- a Department of Maxillofacial Surgery , Positivo University , Curitiba , PR , Brazil
| | | | | | - Anitha Potluri
- d Department of Diagnostic Sciences , University of Pittsburgh , Pittsburgh , PA , USA
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Srebrzyńska-Witek A, Koszowski R, Różyło-Kalinowska I. Relationship between anterior mandibular bone thickness and the angulation of incisors and canines-a CBCT study. Clin Oral Investig 2017; 22:1567-1578. [PMID: 29063382 PMCID: PMC5866828 DOI: 10.1007/s00784-017-2255-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 10/11/2017] [Indexed: 10/25/2022]
Abstract
OBJECTIVES The morphology of the maxillary and mandibular alveolar cortex plays an important role in the planning of orthodontic treatment. Cone-beam computed tomography (CBCT) provides a precise demonstration of anatomical structures. Therefore, the aim of this paper was to evaluate what influence the position of incisors and canines have on the dimensions of the cortical and spongious bone of the anterior mandibular alveolar process. MATERIALS AND METHODS The material consisted of 100 CBCT volumes (61 females and 39 males, aged 18-71 years) obtained by means of a Gendex GXCB-500 machine and analysed using i-CAT Vision and CorelDRAW 9 software. Several linear and angular measurements were taken of cortical and spongious mandibular, vestibular and lingual alveolar bone. RESULTS The thickness of the vestibular spongious bone increased around lateral incisors and canines together with dental axis inclination, as did the thickness of the lingual spongious bone around central incisors and canines with greater angles of vestibular cortex curvature. In all teeth, the thickness of lingual cancellous bone decreased along with increase of the angle of tooth inclination. In the case of almost all groups of teeth, the thickness of lingual cancellous bone around teeth declined as the angle of curvature of the cortical bone decreased. The rotation of mandibular incisors and canines did not affect the thickness of the surrounding bone. CONCLUSIONS The position of teeth has little influence on vestibular bone thickness and is only significant around central incisors. In the case of almost all groups of teeth, the thickness of lingual spongious bone around teeth declined as the angle of curvature of the cortical bone decreased. CLINICAL RELEVANCE CBCT is a diagnostic tool that provides detailed information on the dimensions of the anterior dentate mandibular alveolar process.
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Affiliation(s)
| | - Rafał Koszowski
- Academic Center of Dentistry and Specialized Medicine, Pl. Akademicki 17, 41-902, Bytom, Poland
| | - Ingrid Różyło-Kalinowska
- Independent Unit of Propedeutics of Dentomaxillofacial Radiology, Medical University of Lublin, Karmelicka Street 7, 20-081, Lublin, Poland.
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Khorramdel A, Shirmohammadi A, Sadighi A, Faramarzi M, Babaloo AR, Sadighi Shamami M, Mousavi A, Ebrahim Adhami Z. Association between demographic and radiographic characteristics of the schneiderian membrane and periapical and periodontal diseases using cone-beam computed tomography scanning: A retrospective study. J Dent Res Dent Clin Dent Prospects 2017; 11:170-176. [PMID: 29184633 PMCID: PMC5666217 DOI: 10.15171/joddd.2017.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Accepted: 07/15/2017] [Indexed: 11/25/2022] Open
Abstract
Background. This study was undertaken to
assess the pathological and spatial associations between periapical and periodontal
diseases of the maxillary first molars and thickening of maxillary sinus
mucosa with cone-beam computed tomography.
Methods.
A total
of 132 CBCT images of subjects 20‒60 years of age were evaluated
retrospectively. The patients' sex and age and demographic and pathologic
findings of the maxillary sinus in the first molar area were recorded, graded
and analyzed.
Results.
Approximately
59% of patients were male and 41% were female, with no significant difference
in the thickness of schneiderian membrane between males and females. Based on
the periapical index scoring, the highest frequency was detected in group 1.
Based on the results of ANOVA, there were no significant differences in the
frequencies of endodontic‒periodontal lesions and an increase in schneiderian
membrane thickness. There were significant relationships between periapical
and periodontal infections (P<0.001) and schneiderian membrane thickness.
Furthermore, a significant relationship was detected between the thickness of
the schneiderian membrane and the distance between the sinus floor and the
root apices (P=0.38).
Conclusion.
A
retrospective inspection of CBCT imaging revealed that periapical lesions and
periodontal infections in the posterior area of the maxilla were associated
with thickening of the schneiderian membrane. In addition, there was a significant
relationship between the location of maxillary posterior teeth, i.e. the
thickness of bone from the root apex to the maxillary sinus floor, and
schneiderian membrane thickness.
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Affiliation(s)
- Azin Khorramdel
- Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Adileh Shirmohammadi
- Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Sadighi
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Khorasgan Islamic Azad University, Isfahan, Iran
| | - Masoumeh Faramarzi
- Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Reza Babaloo
- Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehrnoosh Sadighi Shamami
- Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amin Mousavi
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zia Ebrahim Adhami
- Department of Pedodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Dreiseidler T, Lentzen MP, Zirk M, Safi AF, Zoeller JE, Kreppel M. Systematic three-dimensional analysis of wafer-based maxillary repositioning procedures in orthognathic surgery. J Craniomaxillofac Surg 2017; 45:1828-1834. [PMID: 28927954 DOI: 10.1016/j.jcms.2017.08.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 07/20/2017] [Accepted: 08/22/2017] [Indexed: 10/18/2022] Open
Abstract
PURPOSE Little is known about the three-dimensional (3D) transfer accuracy in maxillary repositioning procedures based on conventionally manufactured dental-mounted wafers. The purpose of the present study was a systematic 3D analysis for wafer-based maxillary positioning in orthognathic surgery. MATERIALS AND METHODS A total of 92 patients underwent Le Fort I in addition to mandibular bilateral sagittal split osteotomies (BSSO). Alignment of the pre- and postsurgical CBCT data sets allowed measuring maxillary position changes in axial, sagittal and transversal directions. RESULTS The highest achieved absolute transfer inaccuracies were 1.37 mm, ±0.84 in the sagittal direction, followed by 1.15 mm, ±0.69 in the axial, as well as 1.05 mm, ±0.79 in the transversal direction. The largest relative deviations could be found for repositions in the transversal plane (109.4%, ±4.5), followed by the axial (66.2%, ±51.5) and sagittal plane (49.3%, ±2.2). Significant transfer accuracy differences of repositioning procedures in the sagittal direction, mainly advancement procedures, could be detected if performed with (1.75 mm, ±0.90) or without (1.18 mm, ±0.78) additional rotational correction component. No significant differences were found between unidirectional and multidirectional maxillary correction procedures. CONCLUSION The present study for the first time delivers systematic 3D accuracy data of wafer-based maxillary positioning procedures, attesting to its feasibility but also further encouraging the search for improvement strategies.
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Affiliation(s)
- Timo Dreiseidler
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany.
| | - Max-Philipp Lentzen
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany
| | - Matthias Zirk
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany
| | - Ali-Farid Safi
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany
| | - Joachim E Zoeller
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany
| | - Matthias Kreppel
- University of Cologne, Dept. of Craniomaxillofacial and Plastic Surgery (Head: Professor Dr. Dr. Joachim E. Zoeller), Kerpener Straße 62, D-50924 Cologne, Germany
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Reliability and accuracy of cone-beam computed tomography voxel density and linear distance measurement at different voxel sizes: A study on sheep head cadaver. J Dent Sci 2017; 12:145-150. [PMID: 30895040 PMCID: PMC6395244 DOI: 10.1016/j.jds.2016.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 09/26/2016] [Indexed: 11/23/2022] Open
Abstract
Background/purpose The reliability and accuracy of linear distance and voxel density (VD) measurements are very important in dentistry. The purpose of this study was to assess the accuracy and reliability of linear distances and VD measurements of cone-beam computed tomography (CBCT) at different voxel sizes. Materials and methods Eighteen-millimeter linears of size 40 gutta-percha were prepared in fresh sheep head. The head was scanned using CBCT with 0.25, 0.3, and 0.40 voxel sizes. Standard linear distances of gutta-percha were measured in panoramic CBCT images at 0.25, 0.3, and 0.4 voxel sizes. VD measurements were made separately on spongeous bone of palatal surfaces of the roots of teeth 4, 5, and 6 of maxilla and on cortical bone of teeth 4, 5, and 6 regions of the left and right hemimandibles through cross-sectional imaging. Results We found that linear distance measurements on panoramic image of CBCT were slightly lower than physical measurements. A significant difference was not found for the gutta-percha linear distances and cortical VD measurements at different voxel sizes (P ≥ 0.05). The correlation between measurements of VD at different voxels in cortical bone was greater than 0.85 (P = 0.000). Conclusion Linear distance measurements on the sheep head cadaver of 0.25, 0.3, and 0.4 voxel sizes were similar and reliable when compared with physical measurements. In minimizing radiation exposure, VD measurement of cortical bone at 0.4 voxel-based CBCT could be used to estimate cortical bone density. However, studies should be performed on the human head cadaver.
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Bertossi D, Fiorino P, Corega C, Sbricoli L, De Santis D, Donadello D, Ricciardi G, Luciano U, Bressan E, Pardo A, Albanese M, Zangani A. Cone-beam volumetric imaging in craniofacial medicine. MINERVA STOMATOLOGICA 2017; 68:200-212. [PMID: 28497937 DOI: 10.23736/s0026-4970.17.04003-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
With the development of X-ray computed tomography (CT) in the 1960s and its first use for clinical studies in 1972 by Sir Godfrey Hounsfield, radiological tomography attained widespread use and today is one of the essential imaging techniques in medical radiology. It is a technically mature and clinically widely accepted method and complements classical X-ray panoramic radiography in many areas. The technology is frequently used in craniofacial radiology, because of its characteristic low radiation dose, high spatial resolution and lower cost compared with CT. The aim of this work was to describe the principles of cone beam computed tomography, to make a brief description of the existing devices, to present briefly the use of 3D diagnosis in craniofacial medicine.
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Affiliation(s)
- Dario Bertossi
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy -
| | - Pietro Fiorino
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Claudia Corega
- Department of Orthodontics, Faculty of Dentistry, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Luca Sbricoli
- Section of Dentistry, Department of Neurosciences, University of Padua, Padua, Italy
| | - Daniele De Santis
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Dario Donadello
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Giulia Ricciardi
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Umberto Luciano
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Eriberto Bressan
- Section of Dentistry, Department of Neurosciences, University of Padua, Padua, Italy
| | - Alessia Pardo
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Massimo Albanese
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
| | - Alessandro Zangani
- Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy
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Dağsuyu İM, Kahraman F, Okşayan R. Three-dimensional evaluation of angular, linear, and resorption features of maxillary impacted canines on cone-beam computed tomography. Oral Radiol 2017; 34:66-72. [PMID: 30484094 DOI: 10.1007/s11282-017-0289-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/13/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the localization, angulation, and resorption features of maxillary impacted canines on cone-beam computed tomography (CBCT). METHODS This retrospective study examined the CBCT scans of 140 maxillary impacted canines in 102 patients (43 males, 59 females; mean age: 16.25 ± 6.31 years). The following impacted canine-related parameters were analyzed on the CBCT images: impaction side; location; root resorption levels of adjacent teeth; occlusal plane and midline distances of impacted canines; and angulations of impacted canines to midline, lateral incisor, and occlusal plane. RESULTS Bilateral canine impaction was found in 38 subjects, and unilateral canine impaction was present in 64 subjects. Severe resorption was found in 14 canines. There were no significant differences between the occlusal plane and midline distances to the impacted canine cusp tip and root apex (p > 0.05). The midline angulation of right maxillary impacted canines was significantly higher than that of left maxillary impacted canines (p < 0.05), while the occlusal plane angulation of left maxillary impacted canines was significantly higher than that of right maxillary impacted canines (p < 0.05). CONCLUSIONS Maxillary canine impaction was more frequently seen in female subjects than in male subjects. Lateral incisors were more frequently affected than first premolars, and slight resorption was more frequently seen in adjacent teeth. CBCT assessment of maxillary impacted canines can provide accurate measurements of angular, linear, and resorption parameters.
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Affiliation(s)
- İlhan Metin Dağsuyu
- Department of Orthodontics, Faculty of Dentistry, Eskişehir Osmangazi University, Eskişehir, 26000, Turkey
| | - Fatih Kahraman
- Department of Orthodontics, Faculty of Dentistry, Eskişehir Osmangazi University, Eskişehir, 26000, Turkey
| | - Rıdvan Okşayan
- Department of Orthodontics, Faculty of Dentistry, Eskişehir Osmangazi University, Eskişehir, 26000, Turkey.
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Sang YH, Hu HC, Lu SH, Wu YW, Li WR, Tang ZH. Accuracy Assessment of Three-dimensional Surface Reconstructions of In vivo Teeth from Cone-beam Computed Tomography. Chin Med J (Engl) 2017; 129:1464-70. [PMID: 27270544 PMCID: PMC4910372 DOI: 10.4103/0366-6999.183430] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: The accuracy of three-dimensional (3D) reconstructions from cone-beam computed tomography (CBCT) has been particularly important in dentistry, which will affect the effectiveness of diagnosis, treatment plan, and outcome in clinical practice. The aims of this study were to assess the linear, volumetric, and geometric accuracy of 3D reconstructions from CBCT and to investigate the influence of voxel size and CBCT system on the reconstructions results. Methods: Fifty teeth from 18 orthodontic patients were assigned to three groups as NewTom VG 0.15 mm group (NewTom VG; voxel size: 0.15 mm; n = 17), NewTom VG 0.30 mm group (NewTom VG; voxel size: 0.30 mm; n = 16), and VATECH DCTPRO 0.30 mm group (VATECH DCTPRO; voxel size: 0.30 mm; n = 17). The 3D reconstruction models of the teeth were segmented from CBCT data manually using Mimics 18.0 (Materialise Dental, Leuven, Belgium), and the extracted teeth were scanned by 3Shape optical scanner (3Shape A/S, Denmark). Linear and volumetric deviations were separately assessed by comparing the length and volume of the 3D reconstruction model with physical measurement by paired t-test. Geometric deviations were assessed by the root mean square value of the imposed 3D reconstruction and optical models by one-sample t-test. To assess the influence of voxel size and CBCT system on 3D reconstruction, analysis of variance (ANOVA) was used (α = 0.05). Results: The linear, volumetric, and geometric deviations were −0.03 ± 0.48 mm, −5.4 ± 2.8%, and 0.117 ± 0.018 mm for NewTom VG 0.15 mm group; −0.45 ± 0.42 mm, −4.5 ± 3.4%, and 0.116 ± 0.014 mm for NewTom VG 0.30 mm group; and −0.93 ± 0.40 mm, −4.8 ± 5.1%, and 0.194 ± 0.117 mm for VATECH DCTPRO 0.30 mm group, respectively. There were statistically significant differences between groups in terms of linear measurement (P < 0.001), but no significant difference in terms of volumetric measurement (P = 0.774). No statistically significant difference were found on geometric measurement between NewTom VG 0.15 mm and NewTom VG 0.30 mm groups (P = 0.999) while a significant difference was found between VATECH DCTPRO 0.30 mm and NewTom VG 0.30 mm groups (P = 0.006). Conclusions: The 3D reconstruction from CBCT data can achieve a high linear, volumetric, and geometric accuracy. Increasing voxel resolution from 0.30 to 0.15 mm does not result in increased accuracy of 3D tooth reconstruction while different systems can affect the accuracy.
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Affiliation(s)
- Yan-Hui Sang
- Second Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101; Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Hong-Cheng Hu
- Second Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101; National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Song-He Lu
- Second Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101; National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Yu-Wei Wu
- Second Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101; National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Wei-Ran Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Zhi-Hui Tang
- Second Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101; National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China
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Presurgical Cone Beam Computed Tomography Bone Quality Evaluation for Predictable Immediate Implant Placement and Restoration in Esthetic Zone. Case Rep Dent 2017; 2017:1096365. [PMID: 28321342 PMCID: PMC5340929 DOI: 10.1155/2017/1096365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 01/17/2017] [Accepted: 02/01/2017] [Indexed: 12/25/2022] Open
Abstract
Despite numerous advantages over multislice computed tomography (MSCT), including a lower radiation dose to the patient, shorter acquisition times, affordable cost, and sometimes greater detail with isotropic voxels used in reconstruction, allowing precise measurements, cone beam computed tomography (CBCT) is still controversial regarding bone quality evaluation. This paper presents a brief review of the literature on accuracy and reliability of bone quality assessment with CBCT and a case report with step-by-step predictable treatment planning in esthetic zone, based on CBCT scans which enabled the clinician to evaluate, depending on bone volume and quality, whether immediate restoration with CAD-CAM manufactured temporary crown and flapless surgery may be a treatment option.
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D Oleo-Aracena MF, Arriola-Guillén LE, Rodríguez-Cárdenas YA, Ruíz-Mora GA. Skeletal and dentoalveolar bilateral dimensions in unilateral palatally impacted canine using cone beam computed tomography. Prog Orthod 2017; 18:7. [PMID: 28164257 PMCID: PMC5316518 DOI: 10.1186/s40510-017-0160-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/20/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim of this investigation was to compare skeletal and dentoalveolar measurements of subject with unilateral palatally impacted canine versus the unaffected contralateral side on cone beam computed tomography (CBCT). METHODS A cross-sectional study (split mouth design) that included 28 CBCTs (i.e., 56 sides) with unilaterally impacted maxillary canines was performed. After conducting a pilot test to gauge the researcher, heights and widths of skeletal and dentoalveolar variables obtained in the maxilla were measured using coronal and axial views. The angulations of incisors were also measured, and the side with impaction and the unaffected side were compared. Paired sample t test and Wilcoxon signed-rank test were used. RESULTS Significant statistical differences (2 mm, p < 0.001) were found between the impacted and non-impacted side measurements from the mid-palatine raphe to the first premolar (proximal alveolar bone crest between the canine (deciduous or permanent) and first premolar); the distance were significantly lower (12.72 ± 2.25 mm) than in the side without impaction (14.67 ± 2.00 mm). Also, the central and lateral incisor angulations showed significant reductions; presenting disto-angulated incisors on the impacted canine side (86.14 ± 7.70° and 74.75 ± 12.67°, respectively) and mesial-angulated incisors on the non-impacted side (91.63 ± 6.79° and 81.21 ± 8.56° respectively). The other skeletal and dentoalveolar measurements showed no significant differences. CONCLUSIONS The width from the median raphe to the first premolar is lower in the side of maxillary palatal impacted canines than in the side without impaction. Lateral angulations of incisors were disto-angulated on the side of impacted canines. Both conditions have clinical implications in the orthodontic treatment.
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Affiliation(s)
- Mariel Franchesca D Oleo-Aracena
- School of Dentistry, Universidad Científica del Sur, Lima, Perú.,Division of Radiology and Periodontics, Faculty of Dentistry, Universidad Iberoamericana-UNIBE, Santo Domingo, Dominican Republic
| | - Luis Ernesto Arriola-Guillén
- Division of Orthodontics and Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú. .,, Calle Los Girasoles # 194, Dpto. # 302, Urb. Residencial Los Ingenieros de Valle Hermoso, Santiago de Surco, Lima, Perú.
| | | | - Gustavo Armando Ruíz-Mora
- Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú.,Division of Orthodontics, Faculty of Dentistry, Universidad Nacional de Bogotá, Bogotá, Colombia
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Kamburoğlu K, Kirşan Büyükkoçak B, Acar B, Paksoy CS. Assessment of zygomatic bone using cone beam computed tomography in a Turkish population. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 123:257-264. [PMID: 27989712 DOI: 10.1016/j.oooo.2016.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/30/2016] [Accepted: 10/24/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To provide linear and volumetric measurements of zygomatic bone using cone beam computed tomography (CBCT) images. STUDY DESIGN CBCT images were assessed for 198 patients. Posterior and anterior zygomatic bone widths (M1 and M2), zygomatic bone projection (M3), zygomatic bone height (M4), combined zygomatic arch diameter (M5), maximum cortical thickness (M6), gray value obtained from maximum cortical thickness region (M7), minimum cortical thickness (M8), and gray value obtained from minimum cortical thickness region (M9) were measured. Volume and surface area measurements of the zygomatic bone were also conducted. Sex, age, and side were recorded for each patient. General linear model analysis of variance (ANOVA) was performed (P < .05). RESULTS Age (P < .001) and gender (P = .001) significantly affected M1. Gender significantly affected M3 (P = .003) and M4 (P = .000), with higher values for men. Gender (P = .000) and age (P = .000) significantly affected M5 variation. Only age had a significant effect on M6 variation, with an increase with age (P < .015). Only gender had a significant effect on M7 (P = .005), M8 (P = .000), and M9 (P = .004), with higher values for men. All the factors significantly affected zygomatic bone volume variation (gender, P = .000; age, P = .000; and side, P < .004). CONCLUSION Detailed examination of the zygomatic bone region can be performed with CBCT images.
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Affiliation(s)
- Kıvanç Kamburoğlu
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey.
| | - Burcu Kirşan Büyükkoçak
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - Buket Acar
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey; Department of Periodontology, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Candan Semra Paksoy
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
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Haridas H, Mohan A, Papisetti S, Ealla KKR. Computed tomography: Will the slices reveal the truth. J Int Soc Prev Community Dent 2016; 6:S85-92. [PMID: 27652253 PMCID: PMC5022398 DOI: 10.4103/2231-0762.189734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
With the advances in the field of imaging sciences, new methods have been developed in dental radiology. These include digital radiography, density analyzing methods, cone beam computed tomography (CBCT), magnetic resonance imaging, ultrasound, and nuclear imaging techniques, which provide high-resolution detailed images of oral structures. The current review aims to critically elaborate the use of CBCT in endodontics.
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Affiliation(s)
- Harish Haridas
- Department of Conservative Dentistry and Endodontics, PSM College of Dental Sciences and Research, Akkikavu, Trichur, Kerala, India
| | - Abarajithan Mohan
- Department of Conservative Dentistry and Endodontics, MNR Dental College and Hospital, Medak, Telangana, India
| | | | - Kranti K R Ealla
- Department of Conservative Dentistry and Endodontics, MNR Dental College and Hospital, Medak, Telangana, India
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Deluiz D, Santos Oliveira L, Ramôa Pires F, Reiner T, Armada L, Nunes MA, Muniz Barretto Tinoco E. Incorporation and Remodeling of Bone Block Allografts in the Maxillary Reconstruction: A Randomized Clinical Trial. Clin Implant Dent Relat Res 2016; 19:180-194. [DOI: 10.1111/cid.12441] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/30/2016] [Accepted: 07/11/2016] [Indexed: 11/27/2022]
Affiliation(s)
- Daniel Deluiz
- Postdoctoral researcher, Department of Periodontology; State University of Rio de Janeiro; RJ, Rio de Janeiro Brazil
| | - Luciano Santos Oliveira
- Professor, Department of Implantology; Pontifical Catholic University of Rio de Janeiro; Rio de Janeiro RJ Brazil
| | - Fábio Ramôa Pires
- Professor, Department of Stomatology, Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - Teresita Reiner
- Investigator, Geriatric Research, Education and Clinical Center - Bruce W. Carter Veterans Affairs Medical Center; Miami FL USA
| | - Luciana Armada
- Professor, Department of Endodontics, Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - Marcus A. Nunes
- Professor, Department of Statistics, Federal University of Rio Grande do Norte; Natal RN Brazil
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Rivara F, Lumetti S, Calciolari E, Toffoli A, Forlani G, Manfredi E. Photogrammetric method to measure the discrepancy between clinical and software-designed positions of implants. J Prosthet Dent 2016; 115:703-11. [DOI: 10.1016/j.prosdent.2015.10.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 10/09/2015] [Accepted: 10/14/2015] [Indexed: 10/22/2022]
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Retrospective study to determine the accuracy of template-guided implant placement using a novel nonradiologic evaluation method. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 121:e72-9. [DOI: 10.1016/j.oooo.2015.12.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 12/04/2015] [Accepted: 12/15/2015] [Indexed: 02/06/2023]
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Comparison of digital dental images yielded by digital dental casts, cone-beam computed tomography, and multislice computed tomography for measurement of dental area. Oral Radiol 2016. [DOI: 10.1007/s11282-016-0242-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Nikolic-Jakoba N, Spin-Neto R, Wenzel A. Cone-Beam Computed Tomography for Detection of Intrabony and Furcation Defects: A Systematic Review Based on a Hierarchical Model for Diagnostic Efficacy. J Periodontol 2016; 87:630-44. [PMID: 26876352 DOI: 10.1902/jop.2016.150636] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The aim of this review is to assess the diagnostic efficacy of cone-beam computed tomography (CBCT) for the diagnosis of and/or treatment planning for intrabony and furcation defects, using a well-known six-tiered hierarchical model for diagnostic efficacy. METHODS The MEDLINE, EMBASE, and Cochrane Library bibliographic databases were searched until August 2015 for studies evaluating CBCT imaging for the diagnosis of and/or treatment planning for intrabony and/or furcation defects. The search strategy was restricted to English language publications using the combination of MeSH terms, free terms, and key words. RESULTS The search strategy yielded 16 publications that qualitatively or quantitatively evaluated the use of CBCT for the detection of intrabony and/or furcation defects and how CBCT influenced the diagnosis and/or treatment plan. According to Quality Assessment of Studies of Diagnostic Accuracy-2, all included studies were medium to low risk of bias. The review identified only one study that investigated the societal efficacy, and none evaluated the patient outcome efficacy or therapeutic efficacy. One study investigated the diagnostic thinking efficacy. All other included studies investigated the diagnostic accuracy of CBCT. CONCLUSIONS From the assessed studies, it can be concluded that there is not sufficient scientific evidence to justify the use of CBCT for the diagnosis of and/or treatment planning for intrabony and furcation defects. Furthermore, the effectiveness of CBCT for such diagnostic tasks has been assessed only at low diagnostic efficacy levels.
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Affiliation(s)
- Natasa Nikolic-Jakoba
- Department of Periodontology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Rubens Spin-Neto
- Department of Dentistry, Section of Oral Radiology, Aarhus University, Aarhus, Denmark
| | - Ann Wenzel
- Department of Dentistry, Section of Oral Radiology, Aarhus University, Aarhus, Denmark
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Lincoln KP, Sun AYT, Prihoda TJ, Sutton AJ. Comparative Accuracy of Facial Models Fabricated Using Traditional and 3D Imaging Techniques. J Prosthodont 2015; 25:207-15. [PMID: 26381058 DOI: 10.1111/jopr.12358] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2015] [Indexed: 12/01/2022] Open
Abstract
PURPOSE The purpose of this investigation was to compare the accuracy of facial models fabricated using facial moulage impression methods to the three-dimensional printed (3DP) fabrication methods using soft tissue images obtained from cone beam computed tomography (CBCT) and 3D stereophotogrammetry (3D-SPG) scans. MATERIALS AND METHODS A reference phantom model was fabricated using a 3D-SPG image of a human control form with ten fiducial markers placed on common anthropometric landmarks. This image was converted into the investigation control phantom model (CPM) using 3DP methods. The CPM was attached to a camera tripod for ease of image capture. Three CBCT and three 3D-SPG images of the CPM were captured. The DICOM and STL files from the three 3dMD and three CBCT were imported to the 3DP, and six testing models were made. Reversible hydrocolloid and dental stone were used to make three facial moulages of the CPM, and the impressions/casts were poured in type IV gypsum dental stone. A coordinate measuring machine (CMM) was used to measure the distances between each of the ten fiducial markers. Each measurement was made using one point as a static reference to the other nine points. The same measuring procedures were accomplished on all specimens. All measurements were compared between specimens and the control. The data were analyzed using ANOVA and Tukey pairwise comparison of the raters, methods, and fiducial markers. RESULTS The ANOVA multiple comparisons showed significant difference among the three methods (p < 0.05). Further, the interaction of methods versus fiducial markers also showed significant difference (p < 0.05). The CBCT and facial moulage method showed the greatest accuracy. CONCLUSIONS 3DP models fabricated using 3D-SPG showed statistical difference in comparison to the models fabricated using the traditional method of facial moulage and 3DP models fabricated from CBCT imaging. 3DP models fabricated using 3D-SPG were less accurate than the CPM and models fabricated using facial moulage and CBCT imaging techniques.
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Affiliation(s)
- Ketu P Lincoln
- Department of Graduate Prosthodontics, USAF, Joint Base San Antonio-Lackland, TX
| | - Albert Y T Sun
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Thomas J Prihoda
- Department of Pathology, University of Texas Health Science Center, San Antonio, TX
| | - Alan J Sutton
- Department of Restorative Dentistry, University of Colorado School of Dental Medicine, Aurora, CO
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Dagassan-Berndt DC, Zitzmann NU, Walter C, Schulze RKW. Implant treatment planning regarding augmentation procedures: panoramic radiographs vs. cone beam computed tomography images. Clin Oral Implants Res 2015; 27:1010-6. [DOI: 10.1111/clr.12666] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2015] [Indexed: 01/03/2023]
Affiliation(s)
- Dorothea C. Dagassan-Berndt
- Department for Oral Surgery, Oral Radiology and Oral Medicine; School of Dental Medicine; University of Basel; Basel Switzerland
| | - Nicola U. Zitzmann
- Department of Periodontology, Endodontology, and Cariology; University of Basel; Basel Switzerland
| | - Clemens Walter
- Department of Periodontology, Endodontology, and Cariology; University of Basel; Basel Switzerland
| | - Ralf K. W. Schulze
- Department of Oral Surgery (and Oral Radiology); University Medical Center of the Johannes Gutenberg; University Mainz; Mainz Germany
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Seifeldin SA. Is alveolar cleft reconstruction still controversial? (Review of literature). Saudi Dent J 2015; 28:3-11. [PMID: 26792963 PMCID: PMC4688438 DOI: 10.1016/j.sdentj.2015.01.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/15/2014] [Accepted: 01/27/2015] [Indexed: 11/18/2022] Open
Abstract
Cleft lip and palate (CL/P) is a frequent congenital malformation that manifests in several varieties including unilateral or bilateral and complete or incomplete. Alveolar cleft reconstruction remains controversial with regard to timing, graft materials, surgical techniques, and methods of evaluation. Many studies have been conducted addressing these points to develop an acceptable universal protocol for managing CL/P. The primary goal of alveolar cleft reconstruction in CL/P patients is to provide a bony bridge at the cleft site that allows maxillary arch continuity, oronasal fistula repair, eruption of the permanent dentition into the newly formed bone, enhances nasal symmetry through providing alar base support, orthodontic movement and placement of osseointegrated implants when indicated. Other goals include improving speech, improvement of periodontal conditions, establishing better oral hygiene, and limiting growth disturbances. In order to rehabilitate oral function in CL/P patients alveolar bone grafting is necessary. Secondary bone grafting is the most widely accepted method for treating alveolar clefts. Autogenous bone graft is the primary source for reconstructing alveolar cleft defects and is currently the preferred grafting material.
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Affiliation(s)
- Sameh A. Seifeldin
- Corresponding author at: 11545, Riyadh- B.O. 60169, Riyadh, Saudi Arabia. Tel.: +966 506944359; fax: +966 14678548.
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Model-based segmentation in orbital volume measurement with cone beam computed tomography and evaluation against current concepts. Int J Comput Assist Radiol Surg 2015; 11:1-9. [DOI: 10.1007/s11548-015-1228-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 05/20/2015] [Indexed: 10/23/2022]
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Analysis of linear measurements on 3D surface models using CBCT data segmentation obtained by automatic standard pre-set thresholds in two segmentation software programs: an in vitro study. Clin Oral Investig 2015; 20:179-85. [DOI: 10.1007/s00784-015-1485-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 04/28/2015] [Indexed: 01/10/2023]
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