A mandibular mouthpiece is an oral appliance that keeps the pharynx open for proper airflow during sleep, states ResMed. It does this by holding the lower jaw in a forward position, which helps stabilize the tongue by depressing it. Use of the mouthpiece also results in less snoring during sleep.
A custom mandibular device may be useful for someone suffering from mild to moderate obstructive sleep apnea, which does not always have good results using continuous positive air pressure therapy, states the American Academy of Dental Sleep Medicine. A mandibular device has the advantages of being small, comfortable and noninvasive.