We describe a case of first and second branchial arch syndrome in a patient whose profile and occlusion improved in response to orthognatic surgery.
A 2-year-9-month-old boy was referred to our clinic for the treatment of open bite. Because symptoms were mild the patient was placed under observation. However, open bite and bird face became severer as he grew older. Cephalometric analysis indicated mandibular micrognathia. Before operation, we made and analyzed computer tomography-based three-dimensional models. The models were very useful for operation planning. After preoperative orthodontic treatment, sagittal splitting ramus osteotomy and horizontal sliding advancement genioplasty were performed in two stages.