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Observational Study
Copyright ©The Author(s) 2026. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Orthop. Jan 18, 2026; 17(1): 110090
Published online Jan 18, 2026. doi: 10.5312/wjo.v17.i1.110090
Mid-term outcomes of a novel liner design in kinematically-designed cruciate-retaining total knee arthroplasty
Zoe Alpert, Farouk Khury, Nicholas Sauder, Alan D Lam, Greta Laudes, Christopher M Melnic, Chad A Krueger, Ran Schwarzkopf
Zoe Alpert, Farouk Khury, Greta Laudes, Ran Schwarzkopf, Orthopedic Surgery, NYU Langone Health, New York, NY 10003, United States
Farouk Khury, Division of Orthopedic Surgery, Rambam Health Care Campus, The Ruth and Bruce Rappaport Faculty of Medicine, Haifa 3109601, Israel
Nicholas Sauder, Christopher M Melnic, Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States
Nicholas Sauder, Christopher M Melnic, Orthopaedic Surgery, Newton-Wellesley Hospital, Newton, MA 02462, United States
Alan D Lam, Chad A Krueger, Orthopaedic Surgery, Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA 19107, United States
Author contributions: Schwarzkopf R conceptualized this study; Alpert Z and Khury F performed statistical analysis and drafted and revised the manuscript; Sauder N and Lam AD collected and organized data from their respective sites; Krueger CA, Melnic CM, and Schwarzkopf R supervised this project and performed the surgeries written about in the study.
Institutional review board statement: Institutional Review Board approval was received before beginning this study, No. i23-00714.
Informed consent statement: As a retrospective study, institutional review board approval allowed the use of anonymized clinical data without individual patient consent.
Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article.
STROBE statement: The authors have read the STROBE Statement-checklist of items, and the manuscript was prepared and revised according to the STROBE Statement-checklist of items.
Data sharing statement: All data will be made available upon reasonable request.
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: Zoe Alpert, Research Fellow, Orthopedic Surgery, NYU Langone Health, 380 Second Avenue, New York, NY 10003, United States. zoealpert2@gmail.com
Received: May 29, 2025
Revised: July 18, 2025
Accepted: November 12, 2025
Published online: January 18, 2026
Processing time: 225 Days and 19.6 Hours
Core Tip

Core Tip: This multicenter retrospective review evaluates outcomes following cruciate-retaining total knee arthroplasty using a novel, kinematically designed medial dished tibial insert. With an implant survivorship of 98.6% and significant improvements in subjective outcome measures such as the Knee Injury and Osteoarthritis Outcome Score for Joint Replacement, the results of this study suggest this implant design effectively replicates native knee kinematics. These findings support the use of the medial dished tibial insert as a promising option in cruciate-retaining total knee arthroplasty, warranting further long-term investigation.