From this follow-up study of ten to thirteen years, the following conclusions have been reached:
1. This two-stage procedure in the younger age group is permanently effective in providing accurate reduction, stability, and an excellent range of mobility.
2. Careful attention to details must be employed not only in the first and second stages, but also in the early part of the postoperative care.
3. The results have been better with the unilateral than with the bilateral case.
4. The procedure is not to be employed in children beyond the age of ten, wlile the best results have been obtained in children under eight years of age.