The teeth are embedded within sockets of the upper and lower jawbones

The teeth are embedded within sockets of the upper and lower jawbones

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The teeth are embedded within sockets of the upper and lower jawbones (maxillae and  mandible). Each tooth is surrounded by gum, or gingival, and held in its socket by a  periodontal ligament. The 20 deciduous teeth (baby teeth or milk teeth) are eventually  replaced by 32 permanent teeth. There are three types of teeth, based on shape and function: Incisors have a chisel-shaped edge suitable for biting off food. Cuspids are pointed fangs and are used for tearing food. Premolars (bicuspids) and molars have flat surfaces used for grinding and crushing  food. A tooth has the following structural features:
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Unformatted text preview: Dentin is a calcified tissue (like bone) that makes up the bulk of the tooth. The crown is the portion of the tooth embedded in the bone. The neck is the region at the gumline where the crown and root meet. Enamel is the hard, nonliving material that covers the crown. Calcium compounds make the enamel the hardest substance in the body. Cementum is the bonelike substance that covers the root and binds it to the periodontal ligament. The pulp cavity is the central cavity inside the tooth. It contains blood vessels, nerves, and connective tissue (collectively called pulp)....
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