Question

As part of normal tooth growth, what part of the tooth thickens?

Option 1: Enamel
Option 2: Dentin
Option 3: Cementum
Option 4: Pulp

Answer 1

The dentin thickens as part of normal tooth growth, forming the main bulk of the tooth beneath the enamel and above the pulp cavity.

Step-by-step explanation:

As part of normal tooth growth, the part of the tooth that thickens is the dentin. The tooth is comprised of a crown and a root, both of which contain an inner pulp cavity. The crown has an outer layer of enamel, the hardest substance in the body, while the dentin beneath it forms the bulk of the tooth. The root is covered by another bone-like layer called cementum, which helps to anchor the tooth in place. However, it is the dentin that increases as the tooth develops, not the enamel, cementum, or pulp.