Severe Class II malocclusion with facial asymmetry treated with intraoral vertico-sagittal ramus osteotomy and LeFort I osteotomy

Abstract

In this article, we report the successful treatment of a patient, aged 19 years 11 months, who had a severe Class II malocclusion and facial asymmetry. A combination of intraoral vertical-sagittal ramus osteotomy (IVSRO), intraoral vertical ramus osteotomy (IVRO), and LeFort I osteotomy was used for mandibular advancement and maxillary impaction. The patient had a convex profile because of a retrognathic mandible. She also had severe mandibular deviation and vertical maxillary excess with a canted occlusal plane. A deep overbite of 8.0 mm and an excessive overjet of 10.0 mm were observed. After 16 months of presurgical orthodontic treatment, IVRO in the left ramus and IVSRO in the right ramus were performed with maxillary impaction by LeFort I osteotomy. The mandible was advanced 6.0 mm on the right side, and the maxilla was impacted 4.0 mm at ANS, 2.0 mm at the right first molar, and 5.0 mm at the left first molar. The total active treatment time was 35 months. Both occlusion and facial appearance were significantly improved by the surgical-orthodontic treatment. Occlusion was stable after a year of retention. There were no functional problems during or after treatment. Our results suggest that IVSRO and IVRO combined with LeFort I osteotomy in a patient with severe mandibular retrusion with facial asymmetry might be useful to improve occlusion and facial esthetics.