National Dental Assisting Examining Board (NDAEB) Practice Exam

What components are included in self-cured sealant materials?

1. A base and a catalyst

2. A resin and a filler

3. A hardener and a solvent

4. A dye and a polymer

The correct answer is: A base and a catalyst

Self-cured sealant materials typically consist of a base and a catalyst. The base is a polymer, which forms the primary structure of the sealant, while the catalyst is a substance that initiates the polymerization process, leading to the hardening of the sealant when the two components are mixed together. This two-component system allows the sealant to bond effectively to the tooth surface and provides durability and resistance to wear over time. In contrast, other options do not accurately represent the composition of self-cured sealants. While some dental materials may include resins and fillers, the characteristic of self-cured sealants specifically relies on the interaction between a base and a catalyst to enable the curing process. Aside from that, alternatives such as hardeners, solvents, dyes, and polymers alone do not describe the essential components necessary for the curing process of self-cured sealants. Consequently, acknowledging the correct combination of base and catalyst is crucial for understanding how these sealants function effectively in dental applications.