As an embryo at certain times your teeth are starting to develop as the future line of the jaw bone thickens bud like thickening's form along each jaw with 10 of these being made for the baby teeth, at around three months more tooth buds are made on the inside of the baby teeth which will be used for the permanent teeth which seem to appear at around 7 years old
Even though teeth are composed of a hard bone-like tissue, they are in fact derived from various skin tissues in much the same way as the placoid scales like on sharks and rays.
Each person has 4 different types of teeth in their mouth Incisor, Canine, Premolar and Molar
Each tooth is made of 4 structures
- Enamel is the hard, white covering. Enamel protects the tooth from the wear and tear of chewing. The enamel on your teeth is the hardest substance in your body.
- Dentine is below the enamel on your teeth. It's a yellow bone-like material that's softer than enamel and carries some of the nerves that tell you when something is going wrong inside your tooth.
- Pulp is the centre of the tooth. It's a soft tissue that contains blood vessels and nerves. The pulp is how the tooth receives nourishment and sends signals to your brain.
- Cementum is what covers most of the root of the tooth. It helps to attach the tooth to the bones in your jaw. A cushioning layer called the Periodontal Ligament sits between the cementum and the jawbone. It helps to connect the two.
For a more in-depth explanation of how your teeth are made link to this great page