To evaluate the clinical and radiological results of patients that underwent total knee replacement arthroplasty (TKRA) using a NexGen®. implant, and who were followed up for at least 2 years.

Between July 1996 and June 2002, 100 knees in 67 patients, and followed up for at least 2 years following TKRA using a NexGen®. implant were retrospectively assessed for clinical and radiological results using the assessment standards of the Knee and Functional Score of the American Knee Society.

The average preoperative range of motion in patients with osteoarthritis and rheumatoid arthritis were 107.4° (50-140°) and 105.8° (70-120°), respectively, which had improved to 127.2° (85-140°) and 125.6° (90-140°), respectively, at the final follow up. In addition, the preoperative flexion contracture improved from 11.3° (0-30°) and 10.6° (0-30°) to 1.3° (0-15°) and 3° (0-15°) postoperatively. The results using the assessment standards of the Knee and Functional Score of the American Knee Society were improved from 62 (35-82) and 40 (0-70) to 95.8 (87-100) and 97 (70-100) in patients with osteoarthritis, whereas the patients with rheumatoid arthritis were improved from 53.8 (32-73) and 36 (0-50) to 95.1 (89-98) and 79 (55-95). As a complication, infection occurred in 2 cases; they were given a reimplantation.

TKRA using a NexGen®. implant showed satisfactory improvement in pain relief and function, such as range of motion, as well as a lower occurrence rate of complications.