抄録
Intraoral vertical ramus osteotomy (IVRO) has become a useful surgical management to obtain better functional and esthetic results for patients with mandibular prognathism. Especially, unilateral IVRO performed in combination with sagittal splitting ramus osteotomy (SSRO) on the contralateral side has become a popular surgical management for mandibular prognathism with skeletal facial asymmetry. In this paper, three patients with asymmetric mandibles who underwent unilateral IVRO are reported, with evaluation of skeletal changes during pre-and post-operative treatment using frontal and lateral cephalometric radiographs. No remarkableskeletal shift of the mandible after surgery was observed in all cases, whereas cephalometric analysis indicated the slight positional change of condylar and posteroinferior and lateral jaw movements in two of the three cases. In occlusion, the unilateral IVRO seemed to be a useful technique for mandibular prognathism with skeletal facial asymmetry. However, the occlusal adjustment in postoperative treatment and further follow-up are required.
