Human Teeth

Structure and Tissue Layers

Teeth consist of two main parts: the crown (visible above the gumline) and the root (embedded in the jawbone).

Each tooth contains three principal tissue layers:

Enamel: tough, white, outer covering of the crown; the hardest tissue in the body.

Dentin: forms the bulk of the tooth; yellowish and less hard than enamel, it transmits sensations and supports enamel.

Pulp: soft center containing nerves, blood vessels, and connective tissue for tooth nourishment and sensation.

Additional tissues include cementum (covers the root and attaches to the ligament) and the periodontal ligament (anchors tooth to the jawbone).

Key Functions

Teeth are responsible for mechanical food breakdown to aid swallowing and digestion.

They help with clear pronunciation and are critical for the appearance of the smile and facial symmetry.

The periodontal ligament and sensory nerves support the perception of pressure and pain.

Human teeth thus play crucial roles in nutrition, speech, and facial aesthetics, with each type specially designed for distinct tasks in the process of mastication.