INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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.