Effect of Maxillomandibular Advancement Surgery on Pharyngeal Airway Volume and Polysomnography Data in Obstructive Sleep Apnea Patients.

Purpose: To study volumetric changes in the upper airway in patients with obstructive sleep apnea (OSA) after maxillomandibular advancement (MMA) and compare those findings with polysomnographic (PSG) data of the same patients.

Materials And Methods: The study included 20 patients with OSA (1 woman and 19 men; mean age, 48 yr; range, 31 to 59 yr). Mean values of angles formed by the sella, nasion, and B point and the sella, nasion, and A point before surgery indicated mandibular and maxillary retrognathia, respectively.