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

Lee, Song; Ko, Dong Oh; Kim, Jin Hak; Jeon, Young Won; Kim, Kwan Soo; Kim, Tae Woo

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.