Abstract
Clinical evaluation of 107 patients who underwent orthognathic surgery was performed at of Maxillofacial Surgery, Kobe University School of Medicine between 1973 and 1991.
The results were as follows:
1. In the last eight years, the average annual number of patients was 11, about 9% of operative cases per year.
2. The age of patients who underwent surgery ranged from 16 to 38 years with a mean of 21.0 years.
3. The ratio of males to females was 1: 1.8.
4. About 90% of clinical diagnoses was mandibular prognathism.
5.(1) The predominant chief compalaint in mandibular prognathism patients was esthetic disturbance, and it was 65% in females.(2) The predominant chief complaint in mandibular prognathism with cleft lip and palate patients was masticatory disturbance (about 80%).
6. Eighty-four cases, 78.2% underwent sagittal splitting osteotomy only. Single surgery was performed on 92 cases (86.0%), which was the majority of cases.
7. Obwegeser-Dal Pont method was most frequently used in the group of sagittal splitting ramus osteotomy, but there was a tendency for that method to increase operation time and blood loss as compared with Obwegeser's original method.
8. The average posterior movement of about 6mm was accomplished Obwegeser's original method, and that of about 9mm by was Obwegeser-Dal Pont method.
9. Le Fort I osteotomy of the maxilla with lateral rotation, sagittal splitting ramus osteotomy, and intraoral horizontal ramus osteotomy (modified KosteCka's technique) were simultaneously performed on three patients with severe maxillofacial asymmetry with skeletal tilt of the occlusal plane.
