Distraction osteogenesis treatment of maxillary deficiency for cleft patient using internal distraction device: a case report.

A case of severe maxillary hypoplasia in a 21 years old male Thai patient with a complete unilateral cleft of primary and secondary palates treated by internal distraction osteogenesis for maxillary advancement is presented. Initial evaluation showed Class III malocclusion with total crossbite and Class III skeletal malrelationship. Two intraoral distractors were placed following a Le Fort I osteotomy. A maxillary advancement of 8 mms was obtained with 1 mm overjet. Following distraction, Class III elastics were used to increase the overjet until an overjet of 3 mms was obtained. Both acceptable skeletal and soft tissue relationships and satisfactory occlusion have been produced. After 20 months of postoperative follow-up, the occlusal result is stable and skeletal relapse can not be detected.