National Dental Assisting Examining Board (NDAEB) Practice Exam

What texture does frosty etched enamel have?

1. Glossy

2. Granular

3. Frosty

4. Silky

The correct answer is: Frosty

Frosty etched enamel is characterized by a dull, matte appearance that resembles a frosted surface. This texture is typically achieved through a chemical etching process using phosphoric acid, which removes some of the enamel's minerals and creates tiny micro-roughness on the surface. This roughened texture increases the surface area and enhances the bonding surface for dental materials like sealants or adhesive restorations, improving their retention. The "frosty" appearance is distinct and can be visually recognized, making it the correct choice. The other texture descriptions, such as glossy, granular, and silky, do not accurately represent the nature of frosty etched enamel; therefore, they do not apply in this context. A glossy surface would be smooth and reflective, while granular would suggest a more uneven, coarse surface. Silky implies a smooth texture that does not align with the frosty etch observed on the enamel. Thus, the defining characteristics of frosty etched enamel make it recognizable and effective in dental procedures.