# Teeth 🦷 --- The **teeth** are the only bones you can see. They are located in the [[mouth]]. We use them to eat. Each tooth is primarily made out of a material called **dentin**, which is like bone but even harder. The exeranl surface of the dentin is **enamel**, which is the part of the tooth we see. Enamel is the hardest substance in the body, and is primarily composed of calcium phosphate crystals. Inside the tooth is a [[connective tissue]] called **pulp**, which lives in the **pulp cavity**. Pulp is full of [[blood vessels]] and [[nerves]], which enter and exit the tooth from the **roots**. ## Gomphosis A **gomphosis** (plural: **gomphoses**) is the fibrous, synarthrotic [[joint]] that holds them in the sockets. ![[gomphosis.png]] ___