To evaluate the mid-term (over 5 years) clinical and radiologic results of NexGen® total knee replacement arthroplasty (TKRA)retrospectively.

Between Nov. 1996 and Jun. 1997, 57 knees in 43 patients who had been followed up for 5 years after TKRA with NexGen® were evaluated retrospectively for clinical and radiologic results.

The average range of motion increased from 116degree preoperatively to 125 ° at the last follow-up. In patients with osteoarthritis, the average preoperative knee score (59.9) and functional score (40.3) improved to 94.7 and 83.7, respectively. In rheumatoid arthritis patients, the mean knee score and functional score also improved from 55.6 and 35.9 to 88.9 and 79.9. Roentgenographic evaluation revealed a radiolucency rate of 60%. Complications were periprosthetic fractures in 2 cases and aseptic loosening in 1 case. The latter had received a reimplantation.

The mid-term results of NexGen. TKRA were reliable and satisfactory in terms of improvements of; range of motion, restoration of function, and rare complications. However, long-term follow-up evaluation is necessary to monitor many cases of radiolucent line (60%) in the femoral component.