What is MAS?

Mandibular Advancement Splints (MAS) are dental therapy appliances used for the treatment of snoring and mild to moderate sleep apnoea. The specific therapy is tailored to the individual based on medical history, results of the sleep study and physical examination of the jaw and airway. MAS works by ensuring that the upper airway is kept unobstructed during sleep.

A dentist or orthodontist determines the most suitable MAS from many different options. If snoring arises from the base of the tongue, the MAS brings the lower jaw forward to ensure that the tongue does not fall back whilst asleep. The dentist may recommend a non-adjustable MA, which sits in a fixed position as determined by the dentist. The most effective design is an adjustable MAS, allowing the lower jaw to be brought forward to the most comfortable position that clears the upper airway. Impressions of the mouth, including teeth and bite are taken, recording the most comfortable forward position of the jaw.


A custom-made MAS may take a week or longer for it to be made and fitted.

Some people may initially experience aching of the jaw muscles and teeth, although this should disappear in a few days.

Splints are easy to take care of (and can be cleaned with a toothbrush and toothpaste).

Most MAS devices may be used for 4-5 years, depending on the type of device, and on the wearer. Your dentist will monitor and can repair your MAS if necessary.

MAS may be suitable for patients with no teeth – your MAS specialist will assess your suitability.

The MAS typically starts at $1,100, depending on the type of MAS prescribed. Adjustable MAS are generally more expensive because the fitting of the device involves taking impressions and a model of the mouth, meaning each device is custom-made for patients. Many Private Health Insurance funds offer rebates for treatment devices such as MAS, so check with your insurance provider for more details.

How will participating in a Sleep Study at Sleep SA benefit you?

  • A Sleep Study will determine if MAS is recommended, by monitoring your sleep overnight
  • Once you undertake a Sleep Study, you will have an initial consultation with your dentist to determine which MAS option is best, taking into account your Sleep Study results and the features of your jaw and airway
  • After you acclimatise to your MAS device, a follow-up treatment review Sleep Study may be performed to assess the effectiveness of MAS to treat your Sleep Disorder