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Tooth Information EnchantedLearning.com
Tooth Anatomy
Tooth Quiz
Human Anatomy

tooth anatomy Humans have two sets of teeth, the baby teeth (also called the primary teeth) and the permanent teeth. Children have 20 primary teeth; they are replaced by the permanent teeth by about age 13. Adults have 32 permanent teeth.

Tooth Glossary:

Cementum - a layer of tough, yellowish, bone-like tissue that covers the root of a tooth. It helps hold the tooth in the socket. The cementum contains the periodontal membrane.

Crown - the visible part of a tooth.

Dentin - the hard but porous tissue located under both the enamel and cementum of the tooth. Dentin is harder than bone.

Enamel - the tough, shiny, white outer surface of the tooth.

Gums - the soft tissue that surrounds the base of the teeth.

Nerves - nerves transmit signals (conveying messages like hot, cold, or pain) to and from the brain.

Periodontal membrane/ligament - the fleshy tissue between tooth and the tooth socket; it holds the tooth in place. The fibers of the periodontal membrane are embedded within the cementum.

Pulp - the soft center of the tooth. The pulp contains blood vessels and nerves; it nourishes the dentin.

Root - the anchor of a tooth that extends into the jawbone. The number of roots ranges from one to four.



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