Oral appliance therapy is an effective treatment for obstructive sleep apnea (OSA) and snoring. Administered by a dentist, oral appliance therapy uses a custom-fit, “mouth guard-like” device worn only during sleep. Oral appliance therapy helps maintain an open, unobstructed airway. The following video clip provides a brief overview of the fitting process for an oral appliance. Read more about oral appliance therapy for snoring and obstructive sleep apnea.