Root canal treatment is a dental procedure performed to retain a tooth which is compromised or may otherwise require extraction. Although root canal therapy has a very high degree of success, 90 to 95%, it cannot be guaranteed. Occasionally a tooth which has had root canal therapy may require re-treatment, apical surgery, or even extraction.Inside the root of a tooth is the pulp. The pulp consist of nerves, blood vessels, and connective tissue which are responsible for the development of the root structure and clinical crown. When the pulp becomes symptomatic due to trauma, tooth decay, chipped tooth, cracks, or repeated dental procedures, it must be removed to help alleviate symptoms and heal the tooth.