California Registered Dental Assistant (RDA) Written Practice Exam

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Prepare effectively for the California Registered Dental Assistant (RDA) Written Exam. Utilize our comprehensive quizzes and resources, featuring multiple-choice questions that enhance your understanding and readiness for the exam!

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Which custom tray technique uses a volatile hazardous material?

Silicone impression
Alginate impression
Polyether impression
acrylic resin

The correct answer is: acrylic resin

Acrylic resin is a type of plastic material that can emit a strong odor and release harmful vapors during its curing process. Its use in custom tray technique involves heating it in a stove or heating unit to achieve the required flexibility which can result into releasing toxic fumes. This technique is not recommended for patients who are sensitive or allergic to these chemicals. The other options, silicone, alginate, and polyether impressions do not involve the use of hazardous materials in their fabrication process, making them safer options for patients.