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.
- 1Department of Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Tokushima, Japan.
- 2Department of Orthopaedic Surgery, St. Luke's International Hospital, Chuo-ku, Tokyo, Japan.
- 3Department of Orthopaedic Surgery, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan.
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.
Related
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- Image-based robotic-assisted patellofemoral arthroplasty for isolated patellofemoral osteoarthritis: Short-term survivorship, clinical and radiographic outcomes
- Comparison of clinical outcomes between mobile- and fixed-bearing unicompartmental knee arthroplasty for medial compartment osteoarthritis: a retrospective study
- The Anatomic-Atraumatic-Anterior Reconstructive Technique (A-A-ART) for total hip arthroplasty: A step-by-step pictorial guide to a minimally invasive approach for hip osteoarthritis.
- 'Effectiveness of dual-mobility cups for preventing dislocation after primary total hip arthroplasty by a posterolateral approach and their cost-effectiveness compared to unipolar cups in elderly patients.
BibTeX
@article{kawanishi2026mobilebearing,
title = {{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.}},
author = {Suguru Kawanishi and Daisuke Hamada and Shota Shigekiyo and Keizo Wada and Yasuaki Tamaki and Koichi Sairyo},
journal = {Arthroplasty today},
year = {2026},
month = oct,
doi = {10.1016/j.artd.2026.102180},
url = {https://europepmc.org/article/MED/42910073},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - 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.
AU - Suguru Kawanishi
AU - Daisuke Hamada
AU - Shota Shigekiyo
AU - Keizo Wada
AU - Yasuaki Tamaki
AU - Koichi Sairyo
PY - 2026
DA - 2026/10/13
JO - Arthroplasty today
DO - 10.1016/j.artd.2026.102180
UR - https://europepmc.org/article/MED/42910073
AB - 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.
SN - 2352-3441
ER -