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- Title
Patella resurfacing is not associated with a difference in the Oxford knee score after total knee arthroplasty but stair descent is enhanced.
- Authors
Abbott, Sarah; Radha, Sarkhell; Afzal, Irrum; Sarsam, Karam; Clement, Nick D.; Kader, Deiary F.
- Abstract
Background: The primary aim was to assess the Oxford knee scores (OKS) on patients who underwent a total knee arthroplasty (TKA) with patellar resurfacing compared to those who did not. Secondary aims were to identify: (1) factors associated with resurfacing, (2) the effect of resurfacing on specific components of the OKS related to patellofemoral function, (3) the influence on patient satisfaction, and (4) whether a subgroup of patients had an improved outcome when resurfacing was undertaken. Methods: A retrospective cohort study was undertaken using outcome data from the arthroplasty database held at the study centre. Patient demographics and OKS were collected preoperatively and at 1 and 2 years postoperatively. Patient satisfaction was assessed at 1 and 2 years postoperatively. Results: Three thousand one hundred and twenty-two patients met the inclusion criteria of which 46.5% (n = 1453) underwent resurfacing. There were no differences in the OKS change at 1 or 2 years between those undergoing and not undergoing resurfacing (difference 0.2, p ≥ 0.469). Patients undergoing resurfacing were more likely to be female (odds ratio (OR) 1.53, 95% CI 1.30–1.79, p < 0.001), undergo a posterior stabilised knee (OR 6.87, 95% CI 5.71–8.27, p < 0.001) or had a worse response to question 5—standing from a chair, (p = 0.011) or 12—stair descent, (p = 0.017) of the OKS preoperatively. There was no difference in postoperative patient satisfaction (p ≥ 0.180). There was a significantly greater improvement in question 12 of the OKS at 1 year (p = 0.019) in the resurfaced group. There were no patient-related factors or symptoms that were associated with a clinically significant (≥ 5 points) greater postoperative OKS. Conclusion: Patella resurfacing was not associated with a clinically important improvement in OKS. No specific indications for patella resurfacing were identified that offered an improved outcome, but when it was undertaken there was a greater improvement in the ability to descend stairs. Level of evidence Retrospective diagnostic study, Level III.
- Subjects
TOTAL knee replacement; PATELLA; KNEE; PATIENT satisfaction; STAIRS
- Publication
Archives of Orthopaedic & Trauma Surgery, 2023, Vol 143, Issue 8, p5333
- ISSN
0936-8051
- Publication type
Article
- DOI
10.1007/s00402-022-04733-6