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28-09-2024 | Knee Osteoarthritis | Original Paper

The influence of patellar morphology on clinical outcomes after unicompartmental knee arthroplasty

Authors: Ying-Jin Sun, Ning Liu, Long Huang, Xiang-Yang Chen, Cheng Li, Shuo Feng

Published in: International Orthopaedics | Issue 12/2024

Abstract

Purpose

To evaluate the influence of patellar morphology on functional outcomes and patellofemoral joint alignment after unicompartmental knee arthroplasty (UKA).

Methods

This study retrospectively analyzed the clinical and imaging data of 207 patients with osteoarthritis of the unicompartment of the knee who underwent UKA between September 2020 and April 2023. Patients were divided into three groups according to the Wiberg classification: group W1 (I, n = 47), group W2 (II, n = 117), and group W3 (III, n = 43). Knee function was assessed using the Hospital for Specialty Surgery (HSS) knee score and Feller patellar score, and the incidence of anterior knee pain after surgery was recorded and compared. Imaging parameters such as patellar tilt angle (PTA), lateral patellofemoral angle (LPA) and Insall-Salvati ratio (ISR) were measured to assess patellofemoral joint alignment.

Results

The HSS scores of the three groups were not statistically different; the postoperative Feller scores of the group W3 differed significantly from those of the other two groups. The incidence of early postoperative anterior knee pain was higher in the group W3 than in the other two groups. The difference between preoperative PTA, postoperative PTA and preoperative LPA in the group W3 and the other two groups was statistically significant.

Conclusion

Patients with Wiberg III patellae exhibited worse patellar scores, as well as more anterior knee pain and patellar tilt postoperatively. This finding highlights the need for individualized treatment to the Wiberg III patella during UKA to enhance surgical outcomes.

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Title: The influence of patellar morphology on clinical outcomes after unicompartmental knee arthroplasty
Authors: Ying-Jin Sun
Ning Liu
Long Huang
Xiang-Yang Chen
Cheng Li
Shuo Feng
Publication date: 28-09-2024
Publisher: Springer Berlin Heidelberg
Keywords: Knee Osteoarthritis
Knee Osteoarthritis
Published in: International Orthopaedics / Issue 12/2024
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-024-06336-9

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The influence of patellar morphology on clinical outcomes after unicompartmental knee arthroplasty

Abstract

Purpose

Methods

Results

Conclusion

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Is outpatient joint arthroplasty safe in a high volume academic centre? A retrospective monocentric study using an institutional pathway

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