What Is a Mandibular Advancement Device?
A mandibular advancement device (MAD) is a custom-fitted oral appliance worn during sleep to treat obstructive sleep apnea and snoring. It resembles a sports mouthguard but is specifically engineered to hold your lower jaw (mandible) in a slightly forward position, which prevents the airway from collapsing during sleep.
MADs are the most widely prescribed type of oral appliance therapy and are endorsed by the American Academy of Sleep Medicine as a first-line treatment for sleep apnea — not just a last resort when CPAP fails.
The Science Behind How MADs Work
Obstructive sleep apnea occurs when the muscles and soft tissues of the upper airway relax during sleep, causing a partial or complete blockage. When your airway collapses, you stop breathing — sometimes hundreds of times per night — leading to fragmented sleep, oxygen desaturation, and serious long-term health consequences.
A MAD works by advancing the lower jaw forward by a few millimeters. This forward position tightens the soft tissue and muscles around the airway, including the tongue and soft palate, preventing them from collapsing. The result is a clear, open airway throughout the night.
The amount of advancement is precisely calibrated by your dental sleep specialist — typically starting at a conservative position and gradually titrating forward until optimal therapeutic effect is achieved with minimal side effects.
What Does a MAD Look Like?
A custom MAD consists of two trays — one fitting over your upper teeth and one over your lower teeth — connected by an adjustable mechanism that controls the degree of jaw advancement. High-quality devices use medical-grade materials and are designed for durability, comfort, and precise adjustability.
Custom devices differ significantly from over-the-counter boil-and-bite mouthguards. Custom MADs are fabricated from digital impressions or physical molds of your specific dental anatomy, ensuring a precise fit that is both more comfortable and more effective.
Popular MAD Brands and Designs
There are dozens of FDA-cleared MAD designs available through dental sleep medicine specialists, including:
- SomnoDent — A popular two-piece design with precise millimeter adjustability and high comfort ratings
- Herbst Appliance — A robust design with metal rod-and-tube mechanism, often preferred for more significant advancement needs
- TAP (Thornton Adjustable Positioner) — Features a hook-and-socket mechanism allowing patient-controlled adjustment
- EMA (Elastic Mandibular Advancement) — Uses elastic straps of varying tension for a more flexible feel
Your dental sleep specialist will recommend the most appropriate design based on your anatomy, bite, and clinical needs.
The Fitting Process
Getting a custom MAD typically involves the following steps:
- Initial consultation with a dental sleep medicine specialist who reviews your sleep study results
- Dental examination to confirm you have adequate teeth and jaw health to support the device
- Digital scans or impressions of your teeth
- Laboratory fabrication of your custom device (typically 2–3 weeks)
- Fitting appointment to place the device and make initial adjustments
- Follow-up titration appointments over several weeks to optimize jaw position
- Follow-up sleep testing to confirm therapeutic effectiveness
Who Is a Candidate for a MAD?
Most adults with obstructive sleep apnea are candidates for oral appliance therapy. You need sufficient healthy teeth to anchor the device, and your jaw joints (TMJ) should be free of active pain or arthritis. Your dental sleep specialist will perform a thorough examination to confirm you are a good candidate. Find a qualified specialist at SkipTheCPAP.com to start the process.