抄録
Total knee arthroplasty was performed in 20 ankylosed knees of 18 patients. The series contained 15 cases with rheumatoid arthritis, 2 with osteoarthritis and one with post-infectious ankylosis. These knees achieved a significant increase of arc of motion postoperatively from 26.6±12.4° preoperatively to 68.9±31.3° one year after surgery and 62.5±36.5° after 3.5 years. Fifteen knees were improved, 4 were unchanged and one was worse. Besides division of the bilateral para-patellar retinuculum, sufficient bone resection of the distal femur, closed continuous suction drainage and so forth, quadricepsplasty for the extension ankylosed knee and subperiosteal release at the pes anserinus region for the flexion ankylosed one were necessary to gain better arc of motion after surgery. Early postoperative rehabilitation was necessary. Especially it is important to have more than 90° flexion within one week after operation.
