Since 1976, the Knee mobilization procedures have been performed upon 12 cases of stiff knees due to fractures of the femur and patella. Operative method was Thompson's quadricepsplasty or Kono's method. The average of flexion of the stiff Knees was 52 degrees pre-operatively, and 97 degrees post-operatively, so that the range of 45 degrees was obtained. The best improvement of flexion of the stiff knees was obtained by six weeks post-operatively suggesting importance of early physiotherapy. The post-operative follow-up examination showed that only two patients were able to squat and sit in Japanese style, but almost all patients were satisfied with improvement of the activity of daily living.
