Abstract
A clinico-statistical analysis was performed on 175 cases of orthognathic surgery, in 172 patients over 20 years, at the Department of Oral and Maxillofacial Surgery, Nara Medical University. The patients were 52 males and 120 females, and the average age at surgery was 23 years old. Mandibular protrusion alone and that with asymmetry, open bite or maxillary retrusion were observed in 118 patients. Sagittal split ramus osteotomy was performed in 144 cases, and two-jaw surgery in 34 cases. Glossectomy and genioplasty were performed in 38 cases and 59 cases, respectively. Hypotensive anesthesia for reduction of blood loss was useful. A double splint technique was used for two-jaw surgery, and simulation surgery using a three-dimensional model was performed for maxillo-mandibular asymmetry. The use of an absorbable osteosynthesis system without a need for removal seemed advantageous. Hyposthesia of the lower lip was observed in 150 cases, most of which recovered in 6 months.
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