Cemented mobile-bearing medial unicompartmental knee arthroplasty provides long-term implant survival and sustained functional performance in young and active patients aged 60 or below
Purpose To evaluate long-term outcomes of cemented, mobile-bearing medial unicompartmental knee arthroplasty (UKA) in patients aged 60 or younger, focusing on implant survival, functional results, patient-reported outcome measures (PROMs), and radiographic findings over >10 years. Methods This re...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
September 2025
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| In: |
Knee surgery, sports traumatology, arthroscopy
Year: 2025, Volume: 33, Issue: 9, Pages: 3324-3332 |
| ISSN: | 1433-7347 |
| DOI: | 10.1002/ksa.12703 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/ksa.12703 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ksa.12703 
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| Author Notes: | Kevin-Arno Koch, Michael Thapa, Johannes Weishorn, Mustafa Hariri, Benedict Lotz, Kevin Knappe, Tobias Reiner, Tilman Walker |
| Summary: | Purpose To evaluate long-term outcomes of cemented, mobile-bearing medial unicompartmental knee arthroplasty (UKA) in patients aged 60 or younger, focusing on implant survival, functional results, patient-reported outcome measures (PROMs), and radiographic findings over >10 years. Methods This retrospective single-centre study included 119 knees (102 patients). Implant survival was evaluated using Kaplan-Meier analysis. PROMs included the Oxford Knee Score (OKS), American Knee Society Score (AKSS), UCLA Activity Score and Visual Analogue Scale (VAS). Assessments were performed preoperatively, at mid-term (2-10 years), and at long-term follow-up (>10 years). OKS and AKSS were analysed in relation to Patient Acceptable Symptom State (PASS) thresholds. Radiographs were graded using the Kellgren-Lawrence classification to evaluate lateral osteoarthritis (LOA) progression. Results The implant survival rate was 86.7% (95% CI: 78.5-91.9%) at 15 years, and 81.7% (95% CI: 71.4%-88.5%) at 17.5 years. Revision surgery was required in 18 knees (mean time to revision: 8.7 years), primarily due to progression of LOA. All PROMs improved significantly from baseline to the final follow-up (mean: 16 years; p < 0.0001). Although minor functional declines occurred between mid- and long-term follow-ups, these were not statistically significant (p > 0.05), except for functional AKSS. At the final assessment, 96% of patients exceeded the PASS threshold for OKS, 84% for AKSS objective, and 80% for AKSS functional scores. Radiographic LOA progression was frequent but did not significantly impair functional outcomes. Conclusions Cemented mobile-bearing medial UKA in patients aged ≤60 years demonstrated high long-term implant survival and sustained functional benefit. Even in the presence of radiographic LOA progression, clinical outcomes remained excellent. UKA represents a durable and effective treatment for younger patients with isolated medial compartment osteoarthritis. Level of Evidence Level IV. |
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| Item Description: | Gesehen am 03.03.2026 |
| Physical Description: | Online Resource |
| ISSN: | 1433-7347 |
| DOI: | 10.1002/ksa.12703 |