ABSTRACT
Objective To correct bimaxillary protrusion by using b oth orthognathic operation and orthodontic treatment. Methods 46 bimaxillary protrusion patients, 7 male, 39 female, aged from 19 to 31 years (mean 24.2 years), were surgically corrected since 1996. Of them 31 cases underwent preoperative orthodontic treatment. Cephalometric analysis and model s urgery were performed in all patients and 4 kinds of operation methods were used to correct the deformity. All osteotomy segments were fixed with rigid internal fixation. 39 cases underwent postoperative orthodontic treatment. Re sults 34 cases had been followed-up for ranged from 12 to 72 months (mean 27.7months). All osteotomy segments healed well. There were no severe com plications and evident relapse. The maxillary osteotomy segments were moved back for average (6.3?0.9) mm and mandibular osteotomy segments for average (5.2?1 .2) mm. Both occluding relation and facial contour were satisfied. Co nclusion Bimaxillary protrusion can be satisfyingly corrected by usi ng both of orthognathic operation and orthodontic treatment.