Root canal treatment becomes necessary when the tooth goes so ill that the inflammation extends to its pulp and can no longer be treated with medication in the long term.
Root canal treatment is one way to preserve the tooth. Otherwise, the tooth would have to be extracted or, for example, replaced with an implant. Root-treated teeth can survive for decades after the nerve and blood vessels have been removed through an aseptic sealing of the root canal (root filling).
However, the success of the root canal depends heavily on the quality of the treatment and also on the condition of the tooth pulp. In the case of teeth that have already undergone root canal treatment and are causing further problems, we can try to remove the “old” root canal filling and replace it with a new one (root canal revision). This re-treatment can be worthwhile for saving the tooth.