California Registered Dental Assistant (RDA) Written Practice Exam

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What dental material is used to fabricate dental models?

Acrylic
Gypsum
Composite resin
Silicone

The correct answer is: Gypsum

Dental models are used to replicate a patient's teeth and mouth structure. The most commonly used material for dental models is gypsum, which is a type of powder mixed with water to create a thick paste. This paste is then poured into an impression of the patient's mouth and allowed to harden into a solid replica of their teeth and gums. Acrylic, composite resin, and silicone are not typically used for fabricating dental models as they do not provide the same level of detail and accuracy as gypsum.