Hemimandibular hyperplasia treatment with condylectomy and orthodontic camouflage treatment using miniplate

A 13-year-old growing female patient presented with hemimandibular hyperplasia of the right side, Class III hypodivergent skeletal pattern, and severe facial asymmetry. Corrective surgery was deferred until her growth had been completed. When the patient was 16 years old, a low condylectomy was performed on the hyperplastic side of her mandible to prevent its progressive condylar hyperplasia, while simultaneous orthodontic camouflage treatment was performed with the intrusion of the maxillary right posterior teeth using temporary skeletal anchorage devices without additional orthognathic surgery. A low condylectomy caused anterior and lateral open bite after the downward and backward movement of the chin, which improved Class III appearance. The intrusion of the maxillary right posterior teeth followed by compensating extrusion of the mandibular posterior teeth contributed to improve the patient's facial asymmetry with correction of the transverse occlusal plane and lip canting. After 30 months of treatment, an acceptable esthetic outcome and functional occlusion were achieved. The treatment results were well maintained for 1-year retention. •A growing patient had Class III malocclusion and hemimandibular hyperplasia.•A low condylectomy was performed to correct the mandibular asymmetry and protrusion.•Maxillary right posterior teeth were intruded with temporary skeletal anchorage devices.•Facial asymmetry and mandibular protrusion were improved and stable after 1 year.•Functional adaptation and remodeling of the temporomandibular joint were achieved.