Return to sports after medial unicompartmental knee arthroplasty

Abstract
Purpose The purpose of our study was to evaluate clinical outcomes and return to sports after medial unicompartmental knee arthroplasty (UKA) in middle-aged active patients with concomitant patella-femoral joint (PFJ) osteoarthritis at time of surgery.
Methods One-hundred and fifty-one patients who underwent medial fixed-bearing cemented UKA, between 2012 and 2015, for medial unicompartmental osteoarthritis of the knee, were retrospectively reviewed with a minimum 5-year follow-up. The mean age at surgery was 54.3 years (range 47 to 60 years). Radiological evaluation of patella-femoral joint (PFJ) osteoarthritiswas performed according to Sperner classification to select a control-group (< grade III) and case-group (≥ grade III).  The visual analog scale (VAS) for pain and Knee Society score (KSS) was used to evaluate preoperative and final outcomes.
Physical activity level before and after the surgery was assessed by the use of UCLA score. Results One-hundred and thirty-seven patients (89 males and 48 females) were available at last follow-up. The mean followup was 6.2 years (range 5.2 to 7.5 years). At last follow-up improvements of VAS and KSS scores revealed not significant
correlation with PFJ osteoarthritis. The majority of patients (87.7%) returned to their sports activity after UKA surgery.
Conclusions Improved quality of life and sports activity level resulted in middle-aged, active patients after UKAs. PFJ
osteoarthritis showed no significant correlation with poorer outcomes at 5-year follow-up.
Level of Evidence III, multicenter retrospective cohort study.

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© The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature 2021

Massoni Carlo · Casciano Eduardo · Basile Attilio · Zanini Antonio · Bettinsoli Pierfrancesco ·
Marconi Alessandro · Maiotti Marco · Russo Raffaele · Amato Massimiliano · Santoro Giuseppe · Marco Spoliti ·
Riccardo Maria Lanzetti
Received: 31 December 2020 / Accepted: 2 March 2021

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