Wearing the Oral Sleep Appliance (like a mouthguard for your upper and lower jaw) holds your lower jaw gently forward and opens the airway in the back of your throat. This makes it less likely that the air rippling through the partially closed airway causes snoring, and your breathing flows more easily. Most snorers have sleep apnea, but a few do not. This treatment is very effective for both sleep apnea and snoring.