Oral appliances are small plastic devices that you wear in your mouth, similar to a sports mouth guard. It fits over your upper and lower teeth and holds your lower jaw (mandible) slightly forward when you sleep. The oral appliance keeps your tongue and soft tissues from falling back in your throat, so the airway stays open. Dr. Andrea Ho-Fatt Wang is a Qualified Dentist of the American Academy of Dental Sleep Medicine and a member of the American Academy of Sleep Medicine and has experience treating snoring and sleep apnea with these devices.