On the basis of a follow-up study of 134 hamstring transplantations, the following conclusions are given:
1. Hamstring substitution for residual quadriceps paralysis in poliomyelitis is a highly satisfactory operative procedure.
2. Simultaneous transplantation of the biceps femoris and semitendinosus to the patella is a much more satisfactory reconstructive procedure and produces far better results than transplantation of the biceps alone.
3. Certain principles governing selection of cases, operative technique, and postoperative care, as set forth in the original report of this series of cases, have been altered in accordance with the analysis of results.