A clinicostastical study of inpatients of orthognathic surgery between 1993-2002

ABSTRACT

Dentofacial deformity cases who had undergone orthognathic operation in our depart ment were clinicostastically observed during the past 10 years(1993.1.-2002.7.) This is a clinical study on 388 patinets who underwent orthognathic operation at the Department of oral and Maxillofacial Surgery, College of Dentistry, Chonbuk National University. The ratio of female to male was 1.21. The age distribution of most patients was the period of 20 years, the mean age was 21.32 years. The kind of diagnosis of dentofacial deformity patients and the number are as follows; Mn. prognathism 291cases, Mn. retrognathism 35cases, Mn. prognathism + Mx. retrognathism 19cases, Mx. prognathism 16cases, Facial asymmetry 12 cases, Mn. retrognathism + Mx. prognathism 8cases, Bimaxillary protrusion 4cases, Mx. retrognathism 3cases. The ratio of setback amounts between 10 to 20mm was 47.4% and the advancement amounts between 5 to 10mm was 68% in the sagittal split ramus osteotomy. The cases of genioplasty between 1 to 5mm was 68cases and between 5 to 10mm was 96cases. In the Lefort I osteotomy, the cases undergone operation composed of impaction only at the ratio of 56% and impaciton with advanced at the ratio of 34%, impacion with setback at the ratio of 10%. The ratio of cases fixed by screw and miniplate was 94%, by wiring was 6%.