California Registered Dental Assistant (RDA) Written Practice Exam

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Spreaders and pluggers are used in the?

Cleaning of a tooth
Filling of a cavity
Obturation of a root canal
Extraction of a tooth

The correct answer is: Obturation of a root canal

Spreaders and pluggers are small dental instruments that are used in endodontic (root canal) procedures. They are specialized tools used to shape, compact, and seal the root canal filling material. This is why option C is the correct answer. Options A, B, and D are incorrect because spreaders and pluggers are not used for cleaning, filling cavities, or extracting teeth. These procedures require different instruments and tools. It is important to choose the correct answer in order to have a successful root canal procedure.