Abstract
A review was made of 267 Yoshino total knee arthroplasties performed on 184 patients with rheumatoid arthritis between June 1978 and December 1983. The average duration of follow-up was 14.3 years. Of these patients 46.7% died during the follow-up period. The main causes of death were cardiac disease, respiratory disease and renal disease. According to the Japanese Orthopaedic Association (JOA) knee rating system, JOA scores decreased significantly with time after surgery, but remained significantly higher than the preoperative scores. The flexion angle after surgery had decreased compared with the preoperative flexion angle and decreased further 3 years after surgery and later. The cumulative survival rate was 88.6%. This rate was mainly affected by postoperative infection and aseptic loosening of the tibial components.
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