What are the chances of having to have 2 root canals on the same tooth?

It does happen: An individual may have root canal therapy performed on a tooth and continue to have symptoms after completion. In a symptomatic root canal treated tooth, re-treatment is sometimes offered and performed for a number of reasons.

2 root canal tooth: Root canals are meant to save your tooth if your tooth has had trauma, decay to the nerve, or an abcess. However, the nerve system in a tooth is very complex. Depending on which tooth it is will determine how many canals it will have. There are exceptions to the rules. Some teeth have accessory canals that are very hard to get. It is like a main highway with feeder roads.