Total Knee Replacement with Z-Plasty for the Ankylosed Knee in Rheumatoid Arthritis: Report of Two Cases

Abstract

We performed total knee replacement with Z-plasty of quadriceps for the ankylosing knee in rheumatoid arthritis. The range of motion achieved -5°-85°postoperatively while it was -25°-35°preoperatively. RA knee function score improved significantly from 32 points to 79 points. Though about 10 degrees of extension lag remained, the patients could walk freely with no pain as the muscles recovered. And now they were satisfied without problems in activities of daily living. It may be necessary to have continuous rehabilitation after surgery.