Dental Assistant Practice Exam

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Study for the Dental Assistant Exam. Prepare with flashcards and multiple choice questions. Each question includes hints and explanations to help you succeed. Get ready for your exam today!

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How does phosphoric acid appear once it has been applied for etching?

It appears clear
It appears frosted
It appears glossy
It appears opaque

The correct answer is: It appears frosted

When phosphoric acid is applied for etching, it creates a frosted appearance on the surface. This frosted look is due to the acid's ability to remove the smear layer and roughen the enamel or dentin surface, which enhances the bonding of dental materials such as composite resins or adhesives. The etching process creates microscopic irregularities that reflect light differently, resulting in the characteristic frosted texture. This visual cue is important for dental practitioners, as it indicates that etching has occurred successfully and that the surface is now ready for the application of adhesive materials.