Advantages of the Lateral Approach in Severe Genu Valgus Knee Arthroplasty
Abstract
Introduction: The treatment of severe valgus is complex. The lateral approach described by Keblish is advantageous for the treatment of these deformities. We decided to evaluate our outcomes using a lateral approach in severe genu valgus knee arthroplasty. Materials and Methods: Of 795 primary arthroplasties from January 2012 to March 2020, we analyzed 40 performed by lateral approach. All had a valgus deformity greater than 20º and a sufficient medial collateral ligament. 33 women (3 bilateral) and 4 men were included. Average age was 71 years (59-79). The main cause was osteoarthrosis (82%). The presurgical deformity was 27º (21-39). The preoperative measurements were: Knee Society Score (KSS) 15 (5 to 42). Preoperative functional score (KFS): 17 (0 to 40). Average surgical time: 91 minutes. The average postoperative follow-up was 37 months. Results: Postoperative femorotibial angle 6.2º (range 4º to 10º). Postoperative KSS 79 (46-95). KFS 82 (60-100). Complications: 3 cases (7%), one infection, one case with poor positioning of components, and one case of peroneal neuropraxia. Conclusion: In knee arthroplasty due to genu valgus, this approach allows restoring the femoro-tibial axis and achieving adequate prosthetic stability, even with implants without a greater degree of constraint, with a complication rate comparable to other techniques.Downloads
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