Abstract
Orthognathic surgery was performed on 180 patients from 1984 to 1993 in our clinic. There were 42 male and 138 female patients with a mean age of 20 years. 154 patients (85.5%) were diagnosed with mandibular prognathism. 160 patients (88.9%) underwent sagittal splitting ramus osteotomy (Obwegeser-Dal Pont's method). 29 patients underwent Le Fort I osteotomy. The average time of operation and the average blood loss during operation were 3 hr 41 min and 583 ml for sagittal splitting ramus osteotomy with tongue reduction, 3 hr 13 min and 580 ml for sagittal splitting ramus osteotomy, 4 hr 51 min and 926 ml for Le Fort I osteotomy, 5 hr 49 min and 1, 091ml for two jaw surgery. Tongue reduction (Egyedi-Obwegeser's method) was carried out on 113 patients (62.8%) 169 patients (93.9%) received autologous blood transfusion, and 72% of blood loss was replenished by autologous blood transfusion.
