Question

The hardest constituent of the tooth is

• A. bone
• B. enamel
• C. dentine
• D. pulp

Answer 1

The correct option is B

enamel

The correct option is B

Explanation of the correct option:

1. Enamel is the hardest substance in the human body.
2. It contains the highest amount of minerals.
3. It contains 96% minerals with water and organic materials.
4. A vitreous, usually opaque, protective, or decorative coating material provides shine to the tooth.
5. The enamel is made up mostly of minerals, primarily hydroxyapatite.

Explanation of the incorrect option:

Option A:

1. A bone is a hard organ that constitutes part of the skeleton in most vertebrate animals.
2. Bone protects the various other organs of the body like ribs protect the heart and lungs.

Option C:

1. Dentine is a slightly yellowish avascular tissue that forms the bulk of a tooth.
2. It is a tough and compliant composite material.

Option D:

1. The dental pulp is the soft tissue at the center of a tooth.
2. It contains blood vessels, nerves, and connective fibers.

Final answer: The hardest constituent of the tooth is enamel.