Which of the Following Is True of Tongue-Retaining Devices (TRDs)used

question 6

Multiple Choice

Which of the following is true of tongue-retaining devices (TRDs) used to treat patients with sleep-related breathing disorders?

• A) They typically are made of acrylic resin and are composed of two pieces that cover the upper and lower dental arches.
• B) Over 70 different types of TRDs have been approved by the FDA for treatment of obstructive sleep apnea (OSA).
• C) TRDs are capable of providing continuous positive airway pressure (CPAP).
• D) TRDs generally are made of silicone in the shape of a bulb or cavity.

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