Different names, a shared treatment principle

You may hear oral appliance, mandibular advancement device, mandibular repositioning device, or sleep apnea mouthpiece. Mandible means the lower jaw; advancement means moving it forward. Oral appliance therapy is a broader term, so ask which device and treatment are being discussed.

Product descriptions do not always use these terms consistently. Ask what the device is intended to do, how it is made, and who will provide follow-up care. A product described as a snoring mouthpiece is not necessarily custom made or prescribed to treat your sleep apnea.

Sources: ADA: Obstructive Sleep Apnea · FDA intraoral-device special-controls guidance

What does the appliance do?

A typical custom mandibular advancement appliance fits over the upper and lower teeth. Connections between the parts hold the lower jaw forward. The aim is to help keep the upper airway open during sleep.

This differs from simply placing a protective layer between the teeth. Because the appliance affects jaw position, a qualified dentist assesses the teeth, bite, jaw, and suitability for treatment in coordination with the prescribing clinician.

Sources: AADSM patient fact sheet · NHLBI: Treatment

Fitting, titration, and checking effectiveness

An appliance can fit comfortably without adequately treating obstructive sleep apnea. A dental fit check and a breathing assessment therefore answer different questions.

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Three parts of oral appliance therapy
TermWhat it describes
FittingHow the appliance fits your teeth and mouth.
TitrationAdjusting a device gradually according to an individual treatment plan.
Effectiveness testingChecking whether treatment achieves the intended medical result.

Sources: AADSM updated standards, April 2025 · AASM longitudinal testing guidance, 2021

What an offer of treatment means

If a clinician says an oral appliance may be considered, it means this is a possible treatment option to evaluate. It is not yet a recommendation for a particular model.

Ask how your sleep evaluation, dental examination, prescription, and follow-up fit together. Understanding the responsibilities of the sleep clinician and dentist makes it easier to see why several appointments or tests may be needed.

Explore oral appliance therapy from assessment to follow-up

Questions to clarify the proposed treatment

  • Is the appliance intended for snoring, diagnosed obstructive sleep apnea, or another condition?
  • How will my teeth, bite, and jaw be examined?
  • Who directs adjustments and responds to problems?
  • How and when will treatment effectiveness be checked?

Sources: AADSM updated standards, April 2025

EXPLORE THE EVIDENCE

Sources and further reading

These sources support the explanations. General information does not replace an individual healthcare assessment.

  1. ADA: Obstructive Sleep Apnea Roles of medical providers and dentists, oral appliances, and dental adverse effects.Source checked October 28, 2026
  2. FDA intraoral-device special-controls guidance FDA guidance on intended use, prescription devices and devices specifically cleared for over-the-counter use.Source checked October 28, 2026
  3. AADSM patient fact sheet Patient information about dental assessment, medical diagnosis and oral appliance care.Source checked October 28, 2026
  4. NHLBI: Treatment Treatment options, including lifestyle changes, positive airway pressure and oral devices.Source checked October 28, 2026
  5. AADSM updated standards, April 2025 The 2025 standards for medical and dental collaboration, in-person dental assessment, appliance fitting and ongoing monitoring.Source checked October 28, 2026
  6. AASM longitudinal testing guidance, 2021 The 2021 guidance on follow-up sleep testing, including after non-PAP treatments.Source checked October 28, 2026