Root canal treatment is necessary when the blood or nerve supply to the tooth is inadequate and the pulp is already dead. At the beginning of the infection, you may not feel any pain. In some cases, the tooth may start to darken, which means that the tooth is dying or completely dead. In this case, root canal treatment is needed. The intervention is particularly important as the teeth have both an aesthetic and a functional role. In both respects, it is better to have a root canal than to put off the problem and have it removed later.