Abstract
This paper describes a patient with microgenia and open bite who was treated by mandibular ramus distraction osteogenesis using an intraoral device.The patient was a 21-year-old male. An osteotomy was performed in the mandibular ramus region according to Obwegeser's original method (1955).The mandible was fixed for 4 days to permit callus formation. The mandible was then serially lengthened 0.8mm per day for 20 days, and the mandiblewas lengthened approximately 16mm in total.Occlusion improved, and after 6 months of consolidation, the intraoral device was removed. Bone union was confirmed in X-ray examination. No marked changes in occlusion have been found after 11 months of follow-up by clinical and radiographic observation.
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