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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