title: Stability of Le Fort I osteotomy in class III cases with retropositioned maxillae.
abstract: Of 65 adult class III patients with retropositioned maxillae subjected to Le Fort I Osteotomy, 16 were selected at random for a clinical and cephalometric examination of postoperative stability. Lateral head plates prior to treatment, 6 weeks post-treatment and 1 year post-treatment were compared. In 9 out of the 16 cases 5 year post-treatment head plates were available. Statistical evaluation of the longitudinal differences revealed the repositioned maxilla to remain stable. The upper lip, however, lost 44% of its postoperative advanced position within the 1st year subsequent to the operation. In the period between 1 year and 5 years postoperatively no further cephalometric changes of any significance were recorded.
mesh_terms: D000328:Adult; D002508:Cephalometry; D005069:Evaluation Studies as Topic; D006801:Humans; D008310:Malocclusion / Q000601:surgery*; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008334:Mandible / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D013997:Time Factors