Asymmetry to Symmetry: A Case Report of Mandibular Asymmetry Managed With Distraction Osteogenesis Followed by Genioplasty

Mandibular asymmetry is a facial deformity that affects both function and appearance. It may result from developmental disturbances, trauma, or temporomandibular joint pathology. Distraction osteogenesis (DO) offers a biological method for gradual bone elongation along with simultaneous adaptation of surrounding soft tissues. Genioplasty further refines chin position and facial balance. This report describes the management of a young adult patient presenting with facial asymmetry due to unilateral mandibular hypoplasia. Clinical and radiographic examination revealed reduced ramal height on the affected side, deviation of the chin toward the hypoplastic side, and occlusal canting. A staged surgical approach was planned. In the first phase, intraoral DO was performed at the mandibular ramus-body region. In the second phase, genioplasty was performed to correct residual chin deviation and improve lower facial harmony. Postoperative results showed significant improvement in facial symmetry, mandibular length, and chin alignment.