National Dental Assisting Examining Board (NDAEB) Practice Exam

Which of the following is NOT a reason for using Calcium Hydroxide in dental procedures?

1. It protects the pulp from chemical irritation

2. It prevents tooth decay

3. It stimulates the production of secondary dentin

4. It is compatible with all types of materials

The correct answer is: It prevents tooth decay

Calcium hydroxide is commonly used in dental procedures primarily for its unique properties that benefit pulp protection and dentin regeneration. While it does provide protection from chemical irritation and stimulates the formation of secondary dentin, it does not actively prevent tooth decay. This is because calcium hydroxide is not an antibacterial agent and does not directly kill or inhibit the bacteria that cause caries. Its primary roles are centered around its soothing effect on the pulp and its ability to promote healing. Additionally, it's important to note that while calcium hydroxide is biocompatible with many dental materials, this does not extend to every material without exception. There are certain materials with which it may not perform effectively due to chemical incompatibilities. Therefore, its compatibility should always be evaluated in the context of a specific dental procedure or material being used.