Promising Results of Total Knee Arthroplasty in Patients with Severe Varus Deformity with High Constrained Prosthesis: A Prospective Study.

This prospective non-randomized study, conducted on 41 patients (54 knees) with severe varus deformity (>30º) who underwent total knee arthroplasty (TKA), demonstrated that the mean improvement in the Knee Society Score (KSS) function score after surgery was greater for high-constrained prostheses (HCP, N = 44) compared to low-constrained prostheses (LCP, N = 10). The HCP group included 40 Legacy Constrained Condylar Knees (LCCK) and four hinged knee prostheses, while the LCP group included posterior-stabilizing (PS) prostheses. The mean follow-up duration was 6.5 years. Given the small sample size, randomized clinical trials are needed to validate our preliminary findings.