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.
Keywords
cruciate-retaining knee - valgus deformity - survivorship - clinical outcomes
