下顎仮骨延長法を用いて治療したＰｉｅｒｒｅ Ｒｏｂｉｎ症候群の１例

Abstract

This paper describes a patient with a severely hypoplastic mandible that was corrected with a bilateral distraction procedure. The patient was an 8-year-old boy with Pierre-Robin syndrome who had received a bilateral costochondral graft 2 years ago to lengthen the mandible.A corticotomy was performed in the mandibular body proximal to the previous bone grafts. With the use of external distraction devices, the mandible was maintained in fixation for 6 days to permit callus formation. The devices were then serially lengthened at 0.75mm per day, and the mandible was lengthened about 14 mm in total. After 8 weeks of consolidation, the external fixation was removed, and bony union was confirmed on X-ray examination.This technique proved to be very useful for correcting the bilateral hypoplastic mandible.