Postoperative stability after treatment for maxillary jaw deformity

Abstract

Orthognathic treatment for jaw deformity is performed to improve skeletal malocclusion, functional disorders, and the aesthetics of the face from the frontal and lateral aspect. It is important to understand the dentofacial stability of the jaw after surgical orthodontic treatment. In this review, we survey the literature concerning postoperative stability for all types of orthognathic maxillary for jaw deformities. １． The postoperative stability of single-tooth dento-osseous osteotomy and anterior segmental maxillary osteotomy was good, but that of maxillary posterior segmental osteotomy was poor. ２． Following two-jaw surgery (Le Fort Ⅰ osteotomy and sagittal splitting ramus osteotomy or intraoral vertical ramus osteotomy), the anteroposterior position of the upper/lower jaws and the overjet were stable. However, the vertical position of the upper/lower jaws was unstable, the overbite tended to decrease, and it was thought that the vertical stability depended on the patientʼs dentofacial state atthe first examination. ３． Although maxillary bone lengthening by distraction osteogenesis was subject to relapse from 6 months to 1 year after the surgery, it tended to become stable thereafter.