Sleep apnea surgery involves a variety of surgical procedures to improve airflow through the upper airway and reduce or eliminate sleep apnea. The most common type of sleep apnea surgery is maxillomandibular advancement (MMA), which involves moving the upper and lower jaws forward to create more space in the airway. Other types of sleep apnea surgery include uvulopalatopharyngoplasty (UPPP), which removes excess tissue from the back of the throat, and tongue base reduction, which reduces the size of the tongue.