Root canals are a type of dental surgery known as endodontic therapy. Endodontic therapy is a sequence of treatments for the pulp of a tooth that results in the elimination of infection and protection of the diseased tooth from future invasion. To cure the infection and save the tooth, the Dr. Sargent drills into the pulp chamber and removes the infected pulp and then removes the nerve from the root canal. After this is done he fills each of the root canals and the chamber with an inert material and seals up the opening. Many people view a root canal as a painful procedure. However, most patients report little or no pain during or after the procedure.