All three teeth have three layers.
- Enamel – outer layer
- Dentin – inner layer
- Pulp – the inside of the tooth that contains the nerve and blood supply
Dental decay can spread to the pulp and cause the tissue to die and rot. The toxic byproducts of the the tissue dying cause an infection. To eliminate the infection and the rotting tissue a root canal is performed. During the procedure an opening is created in the top of the tooth. Next, small files are used to remove the diseased tissue. The inside of the tooth is mechanically and chemically cleaned. Lastly, the area is filled with a gutta percha (a rubbery material).