A Static study on the orthognathic surgery via sagittal split ramal osteotomy

ABSTRACT

supply and the change of esthetic category, admission and operation of the patients of facial deformity have been with annual change. This study was conducted in the concept of helping the overall character of orthognathic surgery in future understand and being an important index in the establishment of better treatment course, through the patient, on whom was operated orthognathic surgery via sagiattal split ramal osteotomy in our Dept. of Oral & Maxillofacial Surgery, Chonbuk National University Hospital from 1991. 1. 1 to 1995.12. 31 The results were obtained as follows. 1. The ratio of male to female 11.33 and the ages between 16 and 25 years was 73.6%, and the mean age was 20.4 years. 2. The ratio of setback amount between 6 to 15mm was 84.6% and the advancement amount between 1 to 10mm was 89% and the mean amount of movement was 9.0mm in setback, and 3.6mm in advancement 3. After removal of maxillomandibular fixation(MMF), the distinction of sex was not statistically significant in ROM 4. The ROM following methods of fixation was statisticallty significant in 3rd(P<0.05) with faster rehabilitation in rigid fixation which had shorter MMF period. 5. The rehabilitation of ROM following the operation methods was statistically significant in 1st(p<0.05), 2nd, 3rd, 4th, 6th, 8th, and 12th week(each P<0.01) with fater rehabilitation in the case of SSRO than Lefort I/SSRO(two jaw surgery) 6. The rehabilitation of ROM following direction of mandibular movement did not manifest a statically significant difference in both setback and advancement.