Total Knee Arthroplasty using a Medial Pivot Knee: Minimum 2-year Follow-up Results

ABSTRACT

PURPOSE: To evaluate short-term clinical and radiologic outcomes after Advance(R) total knee arthroplasty (TKA). MATERIALS AND METHODS: We evaluated 226 patients who underwent 348 TKAs using medial pivot knees and who were followed up for more than 2 years. The average follow-up period was 40.6 months. We evaluated clinical outcomes based on range of motion (ROM), Knee Society score, and functional score. Radiographic outcomesand complications were also recorded. RESULTS: The average flexion contracture improved from a preoperative value of 6.2degrees to a last follow-up value of 1.3degrees. The average knee flexion was 114degrees preoperatively and 109degrees at last follow-up. The average knee and functional scores were 43.1 and 50.8, respectively, in the preoperative period and 86.2 and 77.9, respectively, in the postoperative period. Complications included 3 avulsion fractures of the medial collateral ligament, 2 delayed infections, 2 periprosthetic fractures, and 1 patellar dislocation. CONCLUSION: The short-term clinical results associated with medial pivot TKA were acceptable. However, more experience and long-term follow-up will be necessary to better determine the efficacy of this procedure.