California Registered Dental Assistant (RDA) Written Practice Exam

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What is placed to prevent a tray from seating too deeply onto the arch or quadrant?

  1. Bite registration material

  2. Spacers

  3. Dental wax

  4. Utility wax

The correct answer is: Spacers

Spacers are used to prevent a tray from seating too deeply onto the arch or quadrant. Bite registration material, dental wax, and utility wax are not used for this purpose. Bite registration material is used to capture the occlusal relationship between the arches. Dental wax is used for creating custom trays or bite blocks. Utility wax is used to modify appliances and brackets.

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