In order for teeth to remain alive and healthy, each tooth is supplied by nerves and nutrients through a chamber called the root canal. As decay spreads downward and into a decayed tooth, the decay encroaches on the pulp chamber of that tooth, which contains the nerve. This is often what leads to a toothache. In order to remove all of the decay from the tooth, it is sometimes necessary to remove the nerve of the tooth entirely and replace the empty canal with a root canal filling.Retreatments
Unfortunately root canals are not always entirely effective in removing all of the bacterial contents from the tooth chamber. Even if only a little bit of bacteria persists in the root of the tooth, it can sometimes lead to recurrent infection and pain. A root canal specialist (endodontist) is skilled in re-treating the canal chamber by removing the previous root canal filling and intensely cleaning the chamber before filling it again for an improved result.