Abstract
Maxillary deformity is a disorder deriving from either a maxillofacial deformity or displeasing nonesthetic features caused by an abnormality of the maxillomandibular morphology, position or relationship with the maxilla. It has been reported that each type of deformity associated with this disease can be rectified by means of surgical correction. Accordingly, we conducted an evaluation of the outcome of corrective surgery in terms of the mandibular joint, mastication function, esthetic improvement and the psychological effects of surgical correction. Our findings revealed that although a long period of time is required, the masticatory function can be improved, and that esthetic improvement leads to marked psychological changes resulting in a raised level of the subject's social adaptability.