Virtual Surgical Planning and One-Stage Treatment of Active Hemimandibular Hyperplasia.

Hemimandibular hyperplasia was first described in 1836 by Adams as a disorder that causes condylar hyperplasia, deforming facial asymmetry and has an unknown etiology. The objective of this study was to report a patient with surgical correction through orthognathic surgery and high condilectomy for the treatment of hemimandibular hyperplasia. The patient complained of pain and cracking in the right temporomandibular joint region and was dissatisfied with the aesthetic appearance of the face. Virtual planning was done for bimaxillary orthognathic surgery and preparation of prototyped surgical guides. Stereolithographic models were used for the preparation of the acrylic guides of the osteotomies for the high condilectomy and the contour of the mandibular base. Orthognathic surgery resulted in the maxillary repositioning with correction of the inclination of the occlusal plane, reduction of the height of the ramus and right mandibular body and class I dental attachment. Mandibular contour osteotomy was performed with acrylic guide in the basilar. The condilectomy was performed by endaural access. In 2-year follow-up, there are no signs of recurrence.