Case Report
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Nov 6, 2020; 8(21): 5487-5493
Published online Nov 6, 2020. doi: 10.12998/wjcc.v8.i21.5487
New treatment of patellar instability after total knee arthroplasty: A case report and review of literature
Xian-Yue Shen, Jian-Lin Zuo, Jian-Peng Gao, Tong Liu, Jian-Lin Xiao, Yan-Guo Qin
Xian-Yue Shen, Jian-Lin Zuo, Jian-Peng Gao, Tong Liu, Jian-Lin Xiao, Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin Province, China
Xian-Yue Shen, Yan-Guo Qin, Department of Orthopedics, The Second Hospital of Jilin University, Changchun 130041, Jilin Province, China
Author contributions: Shen XY, Gao JP, Xiao JL, and Zuo JL were the clinicians involved in patient diagnostics, management, therapy, and follow-up; Shen XY reviewed the literature and wrote the draft; Qin YG and Xiao JL contributed to reviewing the literature and manuscript drafting; Xiao JL and Zuo JL analyzed and interpreted the imaging findings; Xiao JL and Qin YG was responsible for the critical revision of the manuscript for relevant intellectual content; All of the authors approved the final version of the paper prior to submission.
Informed consent statement: The patient consented to the publication of this study.
Conflict-of-interest statement: The authors declare no conflicts of interest.
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: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Jian-Lin Xiao, MD, PhD, Chief Doctor, Postdoc, Department of Orthopaedics, China-Japan Union Hospital of Jilin University, No. 126 Xiantai Street, Changchun 130033, Jilin Province, China. xiaojianlin10@jlu.edu.cn
Received: June 4, 2020
Peer-review started: June 11, 2020
First decision: September 13, 2020
Revised: September 19, 2020
Accepted: September 28, 2020
Article in press: September 28, 2020
Published online: November 6, 2020
Processing time: 147 Days and 23.1 Hours
Core Tip

Core Tip: Patellar instability is an uncommon complication after total knee arthroplasty (TKA). We report a case who had patellar instability 8 mo after primary TKA, and skyline view revealed a lateral shift of the patella. To eliminate patellar instability, we restored the vastus medialis and performed partial lateral patella facetectomy with lateral retinaculum release. This report is the first to describe successful treatment of patellar instability after TKA by lateral patella facetectomy with lateral retinaculum release. This procedure represents a promising option to restore central patellar tracking in patients with patellar instability after TKA.