Abstract
Obstructive sleep apnea syndrome is characterized by repeated collapse of the upper airway, producing hypopnea, apnea, and hypoxia of hemoglobin. Obstructive sleep apnea is often associated with poor dentofacial development that results in inadequate maxillomandibular space. Polysomanography was performed and the results of the preoperative stage were compared with those of the postoperative stage. This patient had mandibular skeletal deficiency, high gonial angle and a narrow posterior airway space, which were confirmed by cephalometry. In this case, PMA (prosthetic mandibular advancement) was performed as the first treatment, but no significant effect was obtained. Then mandibular advancement osteotomy and genioglossus advancement were performed. As a result, the pharyngeal muscle and base of tongue were advanced and the airway was expanded.
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