Label the anatomical features of a tooth by clicking and dragging the labels to the correct location. Neck Pulp cavity Gingival sulcus Cementum Enamel Periodontal ligament Root canal Bone Root Dentin Gingiva Crown
The Correct Answer and Explanation is:
The provided image is a detailed cross-section of a human tooth, showing its various anatomical structures and surrounding tissues. Here is a breakdown of the labeled features:
Major Tooth Regions (Right Side Labels):
- Crown: This is the visible part of the tooth that protrudes above the gum line. It is responsible for chewing and is covered by enamel.
- Neck: This is the slightly constricted region where the crown meets the root, located at the gum line.
- Gingiva: Commonly known as the gums, this is the soft tissue that surrounds the neck of the tooth and covers the bone.
- Root: This is the portion of the tooth that is embedded in the jawbone, serving to anchor the tooth securely in its socket.
- Bone: This refers to the alveolar bone of the jaw, which forms the tooth socket and provides support for the root.
Internal and Supporting Structures (Left Side Labels):
- Enamel: The hardest substance in the human body, enamel is the protective outer layer of the tooth’s crown.
- Dentin: Located just beneath the enamel and cementum, dentin is a hard, calcified tissue that forms the main bulk of the tooth.
- Pulp cavity: This is the central chamber within the crown of the tooth, which contains the pulp—a soft tissue composed of nerves, blood vessels, and connective tissue.
- Gingival sulcus: A shallow groove or space that exists between the surface of the tooth and the edge of the gingiva.
- Cementum: A thin, bone-like layer that covers the outer surface of the tooth’s root, providing a point of attachment for the periodontal ligament.
- Periodontal ligament: A network of specialized connective tissue fibers that connects the cementum of the root to the alveolar bone, holding the tooth in place while allowing for slight movement during chewing.
- Root canal: This is the narrow channel that runs through the center of the root, containing an extension of the pulp from the pulp cavity.
