Oral appliance therapy (OAT) is a non-invasive treatment for snoring and obstructive sleep apnea, accepted and recommended by the American Academy of Sleep Medicine (AASM). Oral appliances are similar in appearance to mouth guards or retainers and are worn only while you sleep. The appliances are custom fit and work by advancing the lower jaw to keep the airway open during sleep. They also keep the soft tissue in the mouth from collapsing and obstructing breathing, significantly improving sleep apnea symptoms including oxygen saturation and daytime sleepiness. They are small, comfortable, silent and easy to carry when traveling.