National Dental Examining Board of Canada (NDEB) Practice Exam

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Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What enamel structure is most resistant to the action of acid?

Enamel rods
Interprismatic substance
Prismless enamel
Enamel tufts

The correct answer is: Interprismatic substance

Interprismatic substance is the most resistant to the action of acid because it is the inorganic component of enamel that is highly mineralized and less susceptible to acid dissolution compared to other enamel structures. Enamel rods are composed primarily of organic materials and are more vulnerable to acid damage. Prismless enamel does not have a structural framework and therefore is also less resistant to acid. Enamel tufts are areas on the outer edge of the enamel that have a less dense structure and can be more easily damaged by acid.