California Registered Dental Assistant (RDA) Written Practice Exam

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Which of the following instruments is used for tactile discovery of decay?

  1. Mouth mirror

  2. Explorer

  3. Periodontal probe

  4. Scaler

The correct answer is: Explorer

An explorer is used for tactile discovery of decay because it is a sharp and thin instrument that can easily detect any soft spots or holes in the teeth. A mouth mirror, on the other hand, is primarily used for indirect vision and reflection of the mouth during dental procedures. A periodontal probe is used to measure the depth of the pockets between the teeth and gums. A scaler is used for removing plaque and tartar from the teeth. These instruments are not designed for tactile discovery of decay, making them incorrect options.

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