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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What does the dentinal sealer seal?

Enamel Cracks
Dentinal Tubules
Gum Line
Cavity Margins

The correct answer is: Dentinal Tubules

Dentinal sealer, also known as dentinal bonding agent, is a material used in dentistry to seal the dentinal tubules. These tubules are small channels in the dentin, the layer of tooth structure beneath the enamel, and contain nerve endings that can cause tooth sensitivity if left exposed. By sealing these tubules, dentinal sealer helps to prevent sensitivity and improve the bond between the tooth and filling material. None of the other options mentioned are related to the function of dentinal sealer. Enamel cracks are typically repaired with fillings or crowns, the gum line is not sealed but rather protected by the gum tissue, and cavity margins are the edges of a cavity that are prepared before filling it. Therefore, these options are not correct for what dentinal sealer specifically seals.