When the pulp (nerve) of a tooth becomes infected or dies, a root canal therapy is needed to save the tooth. The tooth pulp is a soft tissue made up of nerves and blood vessels located in the pulp chamber, which extends from the middle of the tooth down through the roots.
Infection occurs and allows bacteria to travel through the enamel and dentin layers and into the pulp. The pulp can die or become infected due to a fracture or a blow to the tooth as well.
The process of root canal therapy involves going inside the pulp of the tooth and removing the infected, dead tissue. The space is cleaned and disinfected and sealed with a special dental material. After the root canal is completed a crown is often needed to prevent the tooth from fracturing. Due to the advancement in the dental field today root canal treatments are much more comfortable and can be completed faster.