The purpose of this study is to describe the surgical procedure in correcting Class III patients with long face problems. Class III malocclusions are common clinical problems. A mandibular body osteotomy should be considered for correction of mandibular excess. Occlusion of teeth posterior to the ostectomy site should be carefully evaluated in the planning stages. Radiographic examination of the potential ostectomy sites is very important to proper planning and execution of the surgery This study present a young male of 21 years old who has a dentofacial deformity Class III, with active unilateral condylar hyperplasia. This study evaluates the functional and cosmetic results of mandibular body osteotomy for correction of mandibular excess. The patient was treated 3-D and the evaluation included clinical, radiographs and photographs analysis, pre- and postoperative. The body osteoctomy is accomplished by a single-stage operation. The proximal and distal segments healed by osseous union with 6 weeks with intermaxillary fixation. The surgical procedure makes it possible to obtain an optimal esthetic and functional result in cases of Class III long face patients. This approach represents a useful option for the treatment of these deformities.

Conflict of interest: None declared.