INBDE (Integrated National Board Dental Examination) Practice Exam

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Prepare for the INBDE with our comprehensive quiz that features interactive questions and detailed explanations. Hone your skills and gain confidence before the big test!

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!

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What is the organic content percentage in dentin?

10-20%
20-30%
40-50%
60-70%

The correct answer is: 20-30%

Dentin is a mineralized tissue that makes up the bulk of the tooth structure beneath the enamel. It is composed of approximately 20-30% organic material, which includes collagen fibers, glycoproteins, and other proteins. This organic content gives dentin its flexibility and resilience, allowing it to support the enamel and absorb shock during mastication. Therefore, the correct answer is B (20-30%). The other options are incorrect because they do not accurately reflect the organic content percentage in dentin. Option A (10-20%) is too low, option C (40-50%) is too high, and option D (60-70%) is significantly higher than the actual organic content percentage of dentin.