Mandibular Advancement Splint Efficacy Studies

A mandibular splint or mandibular advancement splint (MAS) is a device worn in the mouth that is
used to treat orofacial disorders including: obstructive sleep apnoea (OSA) and snoring.

The splint treats snoring and sleep apnoea by moving the lower jaw forward slightly, which tightens
the soft tissue and muscles of the upper airway to prevent obstruction of the airway during sleep.
The tightening created by the device also prevents the tissues of the upper airway from vibrating as
air passes over them – the most common cause of loud snoring.