Appliance Science
Understanding Mandibular Advancement Appliances
How custom oral appliances are designed to maintain a controlled mandibular position during sleep, and what that means for appliance design.
What a Mandibular Advancement Appliance Does
A mandibular advancement appliance (MAA) is a custom oral device worn during sleep. It is designed to hold the lower jaw, or mandible, in a slightly forward position relative to its natural resting posture.
This controlled, forward position is intended to help maintain an open airway during sleep. The appliance is prescribed and fitted by a dental professional to match the individual patient's anatomy.
Why Custom Fit Matters
Oral anatomy varies from patient to patient. A custom appliance is designed from the patient's own records, so the fit is specific to the individual rather than a generic, one-size approach.
A precise fit supports retention, comfort and a predictable mandibular position. It also helps the appliance stay in place reliably through the night.
The Master Sleep 20™ Design Approach
Master Sleep 20™ combines several design refinements to create a more compact appliance profile while maintaining controlled mandibular advancement:
- An anterior breathing opening that creates additional space between the upper and lower components while reducing unnecessary anterior bulk.
- Reduced posterior extension that terminates coverage at approximately the mid-first-molar level.
- Refined advancement geometry with a shorter, smoother and more rounded advancement-fin profile.
Controlled Advancement
The goal is controlled advancement — a defined, repeatable mandibular position rather than an arbitrary forward posture. This is what allows the appliance to work consistently, night after night.
The treating dentist determines the appropriate advancement for each patient and prescribes the appliance accordingly.
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