दांतों की सबसे बाहरी परत को क्या कहते हैं?

Question

दांतों की सबसे बाहरी परत को क्या कहते हैं?

1. A. इनेमल (Correct answer)
2. B. डेंटिन
3. C. सीमेंट
4. D. इनमें से कोई नहीं

Correct Answer

Option A — इनेमल

Detailed Solution & Explanation

The correct answer is इनेमल (enamel).

Key Points

• Enamel is the outermost layer of a tooth and the hardest substance in the human body, composed mainly of calcium phosphate.
• Beneath it lies dentine, and at the centre the pulp cavity with nerves and blood vessels.

Additional Information

• Enamel has no living cells, so once damaged it cannot regenerate — which is why cavities are permanent.
• Cementum covers the root, not the crown.
• An adult human has 32 teeth of four types: incisors, canines, premolars and molars.