Introduction: Hemifacial microsomia (HFM) is a branchial arch syndrome and the second most common craniofacial birth defect after cleft lip and palate. This syndrome involves the facial skeleton and ear. The most important goal in treatment of HFM is to improve facial symmetry. Traditionally, segment repositioning and costochondral graft were used for the correction of mandibular asymmetry but recently distraction osteogenesis has been used for it.
Case Presentation: In this article an 8-year-old boy with HFM is presented. He was treated with functional appliance for one year and then at 9 years age distraction osteogenesis was performed for him and at the age of 18, maxillary impaction (right side: 3mm, left side: 13 mm), BSSO of mandible and reduction genioplasty were done for the functional and esthetic reconstruction of the face.
Conclusions: Satisfactory results were obtained in the patient.