Understanding the Parts of a Tooth and How It is Attached to the Alveolar Bone

What are the main parts of a tooth and how is a tooth attached to the alveolar bone?

A. The crown and the root; B. By the periodontal ligament; C. Enamel and dentin; D. Cementum and pulp cavity.

Answer:

The parts of a tooth are the crown, covered by enamel, and the root, surrounded by cementum. Dentin underlies both enamel and cementum, and the tooth is anchored to the alveolar bone by the periodontal ligament.

The two main parts of a tooth include the crown, which is the visible part above the gum line, and the root, which is embedded within the maxilla and mandible. The crown is protected by enamel, the hardest substance in the body, and under the enamel is dentin, a bone-like tissue. The pulp cavity, containing nerves and blood vessels, is surrounded by dentin and extends into the root canal within the root. The root's dentin is covered by cementum, which helps anchor the tooth in place.

Teeth are attached to the alveolar bone by the periodontal ligament, a connective tissue that helps to cushion the teeth within the jawbone and allows slight movement under pressure, such as when chewing.