Modified Genioplasty Combined With Orthognathic Surgeries for the Treatment of Chin Defect Accompanying Micrognathia and Airway Stenosis.

We reported a 16-year-old patient with chin defect accompanying micrognathia and airway stenosis owing to a traffic accident. The treatment of this patient involved a modified genioplasty associated with orthognathic surgeries. Through data analysis, we found that the patient's facial morphology and airway space are greatly improved compared with preoperation: y-axis(T4-T1) = -4.5 degree; FCA (T4-T1) = -18 degree; CSAmin(T4-T1) = 227 mm. In conclusion, the modified genioplasty associated with orthognathic surgeries is an effective way to reshape the defected chin and treat micrognathia and airway stenosis in this case.