抄録
Twenty-eight total knee arthroplasties for the treatment of osteoarthritis were performed with NexGen LPS-Flex knee prosthesis in 28 patients (Flex group) who had 120 degrees or more knee flexion before operation, and were evaluated for range of motion and tibial rotation at 90 degrees of knee flexion and maximum knee flexion at one year postoperatively. These results were retrospectively compared with the one-year postoperative results of a group of 41 NexGen LPS total knee arthroplasties in 34 patients (LPS group), who had osteoarthritis and 120 degrees or more knee flexion before operation. The average preoperative and postoperative extension was–10±9.1, –1.1±3.1 degrees in the LPS group and –9.9±8.0, –1.4±2.3 degrees in the Flex group respectively. The average preoperative and postoperative flexions were 133.1±10.4, 125.8±10.7 degrees in the LPS group and 135.8±7.4, 133.6±8.2 degrees in the Flex group respectively. The postoperative flexion in the Flex group was higher than that in the LPS group. Compared with the LPS group, tibial internal rotation of 90 degrees of flexion and maximum knee flexion were more frequent and larger in the Flex group.
