ArticleJournal of orthopaedic case reports2026
Mid-term Functional Outcomes Following One-stage Single Sitting Bilateral and Unilateral Unicompartmental Knee Arthroplasty: A 5-year Prospective Cohort Study.
Article in Journal of orthopaedic case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Unicompartmental knee arthroplasty (UKA) is a joint-preserving surgical option for individuals with isolated medial compartment osteoarthritis (OA). Although performing UKA on both knees in a single sitting can offer logistical benefits, there is limited data comparing its safety and clinical outcomes with unilateral procedures. The objective of this study was to compare the mid-term functional outcomes, recovery parameters, and complication rates between one-stage single-sitting bilateral and unilateral UKA. Materials and Methods: This observational study included 256 patients diagnosed with medial compartment OA who underwent either onestage single-sitting bilateral UKA (n = 134) or unilateral UKA (n = 122). Functional outcomes were evaluated using the Oxford Knee Score (OKS), pain levels through the Visual Analog Scale (VAS), range of motion (ROM), post-operative satisfaction, and time to return to regular activities over a 5-year follow-up period. Results: Significant improvements in OKS, ROM, and VAS scores were observed in both groups (P < 0.001). Patients undergoing one-stage single-sitting bilateral UKA required fewer physiotherapy sessions (17.6 vs. 21.4, P < 0.001) and returned to daily activities earlier (5.2 vs. 6.4 weeks, P < 0.001), without increased hospital stay or complications. Conclusion: One-stage single-sitting bilateral UKA appears to be a safe and effective treatment strategy for carefully selected patients with medial compartment OA, offering comparable safety and enhanced functional recovery compared to unilateral procedures.
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