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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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