開こうを伴った小下顎症に対して口内法による下顎枝仮骨延長術を行った1症例

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  • A Case of Microgenia with Open Bite Treated by Mandibular Ramus Distraction Osteogenesis using an Intraoral Device

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This paper describes a patient with microgenia and open bite who was treated by mandibular ramus distraction osteogenesis using an intraoral device.<BR>The patient was a 21-year-old male. An osteotomy was performed in the mandibular ramus region according to Obwegeser's original method (1955).<BR>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.<BR>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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