Lin CY, Yu YY. Mandibular left first premolar with three roots and three canals: A case report. World J Clin Cases 2025; 13(13): 100822 [DOI: 10.12998/wjcc.v13.i13.100822]
Corresponding Author of This Article
Yue-Yuan Yu, MD, School of Stomatology, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou 310053, Zhejiang Province, China. 275577782@qq.com
Research Domain of This Article
Anatomy & Morphology
Article-Type of This Article
Case Report
Open-Access Policy of This Article
This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Mandibular left first premolar with three roots and three canals: A case report
Cheng-Yi Lin, Yue-Yuan Yu
Cheng-Yi Lin, Yue-Yuan Yu, School of Stomatology, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang Province, China
Yue-Yuan Yu, Stomatology Hospital Affiliated with Zhejiang Chinese Medicine University, Hangzhou 310053, Zhejiang Province, China
Author contributions: Lin CY analyzed all clinical data and was a major contributor to the writing of the manuscript; Yu YY provided clinical data and made revisions to the manuscript; all of the authors read and approved the final version of the manuscript to be published.
Informed consent statement: The legal guardian of the patient in this case provided written informed consent prior to treatment.
Conflict-of-interest statement: The authors declare that they have no competing interests.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Yue-Yuan Yu, MD, School of Stomatology, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou 310053, Zhejiang Province, China. 275577782@qq.com
Received: August 27, 2024 Revised: November 29, 2024 Accepted: December 20, 2024 Published online: May 6, 2025 Processing time: 136 Days and 20.9 Hours
Abstract
BACKGROUND
The numbers of mandibular first premolar roots and root canals vary, and the incidence of three roots and three canals is 0.09%.
CASE SUMMARY
In this article, we review the root and root canal conditions for the mandibular first premolar and report the case of a mandibular left first premolar with three roots and three canals in a male patient, with suggestions for clinical diagnosis and treatment. The patient was referred by an orthodontist for the extraction of the tooth. Preoperative cone-beam computed tomography examination revealed that it had three roots. Under local anesthesia, the extraction socket was carefully expanded, and the tooth was successfully removed intact using forceps. The procedure was uneventful, with no root fractures, postoperative bleeding, or sensory abnormality observed.
CONCLUSION
The mandibular first premolar is characterized by multiple roots and canal variations that can increase the difficulty of treatment.
Core Tip: This article highlights a rare case of the orthodontic extraction of a mandibular left first premolar with three roots and three canals. It offers practical clinical insights and summarizes recent global incidence rates for this unique anatomical variation.
