Oral and dental restoration of wide alveolar cleft using distraction osteogenesis and temporary anchorage devices

摘要

Closure of large alveolar clefts and restoration by a fixed bridge supported by implants is a challenge in cleft alveolus treatment. A major aesthetic concern with distraction osteogenesis is obtaining a predictable position of the implant in relation to the newly generated bony alveolar ridge. We describe the treatment of a large cleft alveolus and palate reconstruction by distraction osteogenesis utilizing temporary anchorage devices (TADs) followed by a fixed implant-supported bridge. The method consists of segmental bone transport by distraction osteogenesis using a bone-borne distractor to minimize the alveolar cleft, followed by closure of the residual small defect by bone grafting three months later. During the active transport distraction, TADs were used exerting multidirectional forces to control the distraction vector forward and laterally for better interarch relation. A vertical alveolar distraction of the newly reconstructed bone of 15 mm facilitated optimal implant placement. The endosseous implants were osteointegrated and supported a fixed dental prosthesis. In conclusion, the large cleft alveolus defect was repaired in three dimensions by distraction osteogenesis assisted by TADs, and the soft tissues expanded simultaneously. Endosseous implants were introduced in the newly reconstructed bone for a fixed dental prosthesis enabling, rehabilitation of aesthetics, eating and speaking.