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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If a tooth is nonvital, what is fabricated and placed into the pulp for better retention of a crown?

Crown only
Filling material
Bridge
Post and core

The correct answer is: Post and core

A nonvital tooth means that the tooth is no longer living, and therefore remains in a weakened state. In order to strengthen the tooth for the placement of a crown, a post and core is necessary. A crown alone would not be able to provide enough support, and a filling material or bridge would not be able to provide the necessary retention for the crown. Therefore, a post and core is the best option for a nonvital tooth in need of a crown.