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Dentistry · Tooth anatomy
Sample itemWhich tissue is the hardest substance in the human body?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Enamel
Enamel is highly mineralized and forms the protective outer covering of the crown; it is harder than dentin and cementum but cannot regenerate once substantially lost.
Option by option
A. Enamel (correct)
Correct: enamel is the most highly mineralized and hardest body tissue.
B. Dental pulp
Pulp is soft neurovascular connective tissue.
C. Cementum
Cementum covers the root and is softer than enamel.
D. Dentin
Dentin lies beneath enamel and is less mineralized.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.