Postoperative results of Yoshino total knee prosthesis. A report of 264 arthroplasties performed between 1974 and 1980.

A review was made of 264 Yoshino total knee arthroplasties performed on 154 patients between February 1974 and July 1980. The average duration of the follow-up was 3 years and 2 months. Eighty-six percent were rheumatoid patients. Complications occurred in seven patients. The evaluation results indicated excellent relief of pain and improvement in walking ability. However, pain of the patellofemoral joint was noted in a number of osteoarthritic patients. This implies that a patella implant is necessary in the case of osteoarthritis. In addition, a new surgical technique was performed on "stiff" knees to improve their degree of movement; the average range of movement achieved in these patients was 70 degrees.