[Total replacement of ankylosed hips (author's transl)]

31 patients were operated on using total hip replacement. Most of them had suffered an ankylosis of the hip in malposition, resulting in pain in the lumbar spine and knee. The average post-operative mobility was of 75 degrees of flexion. Stability returned to normal one year after operation. The pain in the lumbar spine was consistently improved, and could be completely relieved in cases without spinal arthrosis if it was of short duration. Pain in the knee was completely relieved in cases where the procedure restored a satisfactory bio-mechanical state. 29 patients were reviewed, of which 25 were satisfactory.