Abstract
The patient was a 23-year-old man who had been operated on for ameloblastoma of the mandible 4 years ago. Tumor resection was repeated for a local recurrence 8 months later. Subsequently, no sign of recurrence has been observed. Restoration of the occlusion using osseointegrated implants was planned. Before implant placement, vertical alveolar augmentation by distraction osteogenesis was planned because the alveolar ridge showed severe atrophy in the right premolar and molar regions of the mandible. A boxshaped osteotomy of the alveolar bone was carried out in the premolar and molar region. Then, an alveolar distractor (LEAD System) was fitted on the bone and fixed to both the transport and base segments. After a 7-day recovery period, distraction was done at a rate of 0.8 mm/day for 8 days. Sufficient height of the alveolar process was restored by distraction. The distraction device was then left in place for 23 weeks. New bone formation in the distraction gap was observed at reentry operation for device removal and implant placement. The dental implants were successfully placed into the augmented alveolar bone.
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