Role of sliding osteotomy of lateral femur condyle in correcting severe fixed valgus deformity in total knee arthroplasty

Abstract

To explore the surgical techniques and clinical efficacy of sliding osteotomy of lateral femur condyle in severe fixed valgus deformity during total knee arthroplasty (TKA). A total of 11 consecutive patients (11 knees) undergoing primary TKA for severe valgus deformities were recruited between November 2007 to November 2009. There were 2 males and 9 females with an average age of 67 (58-76) years. The follow-up period was 12-61 months. Primary TKA was performed via a medial parapatellar approach. And conventional osteotomy and soft tissue release were performed. Sliding osteotomy of lateral femur condyle was performed in all cases. Posterior stabilized prosthesis was employed and clinical outcomes were evaluated by the relevant parameters. The knee society score improved from 51.5 ± 7.8 to 89.9 ± 2.8 and functional score increased from 40.4 ± 7.3 to 84.2 ± 5.9. The tibiofemoral angle changed from a preoperative value of (161.4 ± 4.4)° to a postoperative value of (172.8 ± 1.0)°. Patella dislocation was not reported. And no other complications occurred during the follow-up. Sliding osteotomy of lateral femur condyle is effective for fixed valgus knee deformity during TKA. Improvement of joint function may be achieved significantly with satisfactory clinical outcomes.