California Registered Dental Assistant (RDA) Written Practice Exam

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What does the dentist use to express light body impression material around a prepared tooth?

  1. A brush

  2. A spatula

  3. A syringe

  4. Their finger

The correct answer is: A syringe

The dentist uses a syringe to express light body impression material around a prepared tooth because it allows for precise placement and application of the material in hard-to-reach areas, ensuring an accurate impression of the tooth. Options A, B, and D are incorrect because a brush would not provide enough pressure to properly express the material, a spatula would be too difficult to maneuver in the mouth, and using their finger could contaminate the material.

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