A Case of Facial Asymmetry Caused by Unilateral Condylar Hyperplasia Treated by Bimaxillary Surgery with Preoperative Simulation and Intraoperative Navigation after Condylectomy

A case of unilateral condylar hyperplasia is reported. The results were as follows. The patient, whose symptoms were manifested in early adolescence, was diagnosed as having cryptogenic and genuine condylar hyperplasia. This case showed facial asymmetry accompanied by a tilt of the occlusal plane. Functional mandibular movement was obtained by a high condylarectomy and preserving the disk of the temporomandibular joint. In addition, two-jaw surgery was selected secondarily, because of severe facial asymmetry with a tilt of the occlusal plane, and it resulted in favorable facial morphology and occlusion.