Mobile-Bearing Total Knee Arthroplasty Using Subvastus Approach With Lateral Retinacular Release for Valgus Knee Osteoarthritis With Permanent Dislocation of the Patella: A Case Report and Narrative Review

IF 2.1 Q3 ORTHOPEDICS

Arthroplasty Today Pub Date : 2026-10-01 Epub Date: 2026-10-13 DOI:10.1016/j.artd.2026.102180

Suguru Kawanishi MD, Daisuke Hamada MD, PhD, Shota Shigekiyo MD, Keizo Wada MD, PhD, Yasuaki Tamaki MD, PhD, Koichi Sairyo MD, PhD

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引用次数: 0

Abstract

Permanent dislocation of the patella (PDP) with valgus knee osteoarthritis is rare and challenging in total knee arthroplasty. A 55-year-old woman with PDP and valgus knee osteoarthritis underwent mobile-bearing posterior-stabilized total knee arthroplasty using the subvastus approach. Extensive lateral retinacular release and partial transverse division of the rectus femoris were required for stable patellar reduction and 90° of flexion. Independent ambulation was achieved at 3 months. At 1 year, knee flexion remained limited; however, the functional activities score on the 2011 Knee Society Score improved from 39 to 67, and the Forgotten Joint Score-12 from 20 to 40. No recurrent dislocation or radiographic complications occurred. This case demonstrates that this surgical strategy can provide stable patellar tracking and functional improvement in PDP with valgus knee osteoarthritis.

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外侧支持带松解股下入路可移动全膝关节置换术治疗外翻膝骨性关节炎伴髌骨永久性脱位1例报告及叙述回顾

髌骨永久性脱位伴外翻膝骨性关节炎在全膝关节置换术中是罕见且具有挑战性的。一名55岁患有PDP和外翻膝骨性关节炎的女性采用股下入路行负重后稳定全膝关节置换术。广泛的外侧支持带释放和股直肌的部分横向分离是稳定的髌骨复位和90°屈曲所必需的。3个月时实现独立行走。1年时，膝关节屈曲仍然有限；然而，2011年膝关节社会评分的功能活动评分从39分提高到67分，遗忘关节评分-12从20分提高到40分。无复发脱位或影像学并发症发生。本病例表明，这种手术策略可以提供稳定的髌骨追踪和功能改善的PDP外翻膝骨关节炎。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Arthroplasty Today Medicine-Surgery

CiteScore

2.90

自引率

0.00%

发文量

258

审稿时长

40 weeks

期刊介绍： Arthroplasty Today is a companion journal to the Journal of Arthroplasty. The journal Arthroplasty Today brings together the clinical and scientific foundations for joint replacement of the hip and knee in an open-access, online format. Arthroplasty Today solicits manuscripts of the highest quality from all areas of scientific endeavor that relate to joint replacement or the treatment of its complications, including those dealing with patient outcomes, economic and policy issues, prosthetic design, biomechanics, biomaterials, and biologic response to arthroplasty. The journal focuses on case reports. It is the purpose of Arthroplasty Today to present material to practicing orthopaedic surgeons that will keep them abreast of developments in the field, prove useful in the care of patients, and aid in understanding the scientific foundation of this subspecialty area of joint replacement. The international members of the Editorial Board provide a worldwide perspective for the journal''s area of interest. Their participation ensures that each issue of Arthroplasty Today provides the reader with timely, peer-reviewed articles of the highest quality.