Oklahoma Pit and Fissure Sealants State Practice Exam

Which characteristic describes an effective etching of enamel?

1. Reflective surface

2. Smooth surface

3. Frosty appearance

4. Glazed appearance

The correct answer is: Frosty appearance

An effective etching of enamel is characterized by a frosty appearance. This texture indicates that the enamel surface has been properly treated to increase its surface area and enhance the bonding potential for sealants or restorative materials. The frosty look results from the etching process, usually achieved by applying an acid, which removes some of the mineral content from the enamel, creating microscopic irregularities. These irregularities provide the necessary roughness for an effective mechanical bond. The other characteristics, such as a reflective surface, smooth surface, and glazed appearance, do not indicate successful etching. A reflective surface would suggest that the enamel is intact and unaltered, while a smooth surface might indicate that the etching process has not occurred effectively, and a glazed appearance signifies a polished finish that does not promote bonding. Hence, the frosty appearance is a clear and correct indicator of effective enamel etching.