A 2-Year Follow-Up of Changes After Bimaxillary Surgery in Patients With Mandibular Prognathism: 3-Dimensional Analysis of Pharyngeal Airway Volume and Hyoid Bone Position

The hyoid bone moved posteriorly and the pharyngeal airway volume was decreased at 6 months after bimaxillary surgery. These measurements had a tendency to recover at 2 years postoperatively. The decrease in pharyngeal airway volume was not correlated with positional changes of the hyoid bone.