BEST ROOT CANAL CENTRE IN ARUMBAKKAM! Root canal therapy begins by gaining access to the tooth’s interior via a small opening made in its surface. Then, diseased or dead pulp tissue is removed from deep inside the tooth. The “canals” containing the nerve, which extend down into each root is removed, cleaned and disinfected. After being filled with an inert material, the tooth is sealed to help prevent re-infection. Sometimes a crown or “cap” is needed to hold the tooth together and restore normal function. The success rate for a root canal these days is in the upper 95% to 99% range.