7. The human tooth is composed of enamel, dentin, pulp and cementum. A cavity that appeared on the biting surface of the tooth would be located on which part of the tooth?
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Answer:
enamel
The enamel is the hardest material made by the body and generally covers the tooth where it is exposed above the gum line. The dentin, which lies just below the enamel at the crown and is covered by the cementum at the root of tooth, functions as a protection for the pulp. The cementum is at the root of the tooth and acts as "cement" to stabilize the tooth.
The central part of the tooth is the pulp, also called the nerve. This is responsible for creating dentin, providing sensory information, and nourishing the tooth. A cavity large enough to reach the pulp, or one that allows bacteria to infect the pulp, is one cause of a toothache.