1989 Volume 35 Issue 6 Pages 1554-1563
Forty patients with mandibular deformity have undergone a modified sagittal splitting osteotomy of ramus extending to premolar area with miniplate-osteosynthesis. Results were as follows: 1) Preoperative diagnosis of these cases was 37 of prognathia with or without open bite and asymmetry, two of open bite and a case of asymmetry. 2) Average operation time and blood loss was 137 minutes and 356ml. Mandibular body after splitting was moved maximally 13 mm backward and 11 mm upward. 3) Complications were two of fracture of medial part of buccal cortex and three of injury of mental neurovascular bundle. 4) Miniplate-osteosynthesis with no skin incision and about seven-days intermaxillary fixation were performed. Postoperative course after release of this fixation was not eventful. 5) Relapse was obviously less than that in cases of circumferential wiring. 6) This method, therefore, seemed to have wide application for procedure of mandibular deformity.