National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Before dentin bonding, what must be done to the smear layer?

Preserved
Removed
Enhanced
Compressed

The correct answer is: Removed

Before dentin bonding, the smear layer must be removed. The smear layer is a thin layer of debris that forms on the surface of dentin during the cutting of teeth, which can interfere with the bonding process of adhesives. Its presence can create a barrier that inhibits the penetration of bonding agents into the dentin surface, thereby reducing the strength and effectiveness of the bond. To achieve an effective bond, it’s crucial to use an appropriate etching technique. This typically involves applying an acid solution that demineralizes the top layer of dentin and helps to remove or alter the smear layer. By doing this, the dentin surface is cleaned and opened up, allowing the bonding agent to penetrate more effectively into the dentinal tubules and establish a stronger bond between the tooth structure and restorative materials. This process is essential for ensuring the longevity and durability of dental restorations.