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DOI: 10.1055/s-0039-1696956
High Medium-Term Survivorship of Cruciate-Retaining Total Knee Arthroplasties (110 Knees) for Valgus Deformity
Funding None.
Abstract
The main purpose of this article is to evaluate the clinical outcomes and survivorship of cruciate-retaining (CR) knee arthroplasties for valgus deformity. This article is retrospective consecutive series of 110 valgus knees using CR implants with a minimum 2-year follow-up. Deformity correction was achieved using stepwise sequential soft tissue releases (iliotibial band, popliteus tendon, lateral collateral release through sliver femoral condylar osteotomy). Demographic data, range of movement, and degrees of deformity were collected. The Oxford Knee Score (OKS) was used as patients' reported outcome measure at final follow-up. One-hundred and four patients (110 knees) were included (87 females/17 males) with mean age of 68.7 years. Primary diagnosis was osteoarthritis in 85 patients and rheumatoid arthritis in 19 patients. Mean follow-up was 5.5 years (median: 5 years; range: 2–14 years). Preoperative valgus deformity was measured radiographically using the mechanical tibiofemoral angle with a mean 18.6° (standard deviation [SD]: 7.5; range: 11–38°). At final follow-up, mechanical tibiofemoral angle was 3.8° (SD: 1.97; range: 2–8°). A p-value was <0.0001 and mean OKS was 42 (SD: 5.4; range: 36–48) suggesting satisfactory patients' reported outcomes with no implant revision for any cause. CR implants for valgus knees using staged soft tissue releases including sliver condylar osteotomy had excellent medium-term survivorship and satisfactory patient reported outcome measures. The Level of Evidence for this study is IV.
Note
The study was approved by the local research and clinical effectiveness department.
Publication History
Received: 06 May 2019
Accepted: 26 July 2019
Article published online:
18 September 2019
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