Prosthodontics & Occlusion · single question
A patient with obstructive sleep apnea (OSA) wears an oral appliance to treat it. How does this device work?
Show answer and explanation
Correct answer: C. Moves the mandible forward during sleep
Mandibular advancement (repositioning) devices work by holding the mandible (and, with it, the tongue base attached to it) in a forward position during sleep, which increases the retroglossal/pharyngeal airway space and reduces airway collapse — they do not retrude the tongue or alter palatal vault height.
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