The region of the tooth, which can be protected by the hard enamel and layer of dentin of the tooth, is traditionally known as the pulp and is found below the gumline. It's made up of living tissue and is the part of the tooth which endodontists concentrate on and soft. The pulp of the tooth can get damaged, inflamed, or rotten through trauma, injury, or decay and so needs to be treated or removed. If it preserved and could be treated, that keeps the enamel alive from the patient's mouth. But if it cannot be preserved, the treatment is known as a root canal, which is probably the most common procedure performed by endodontists in their livelihood.