How often do root canals need to be redone?
William Rodriguez
Updated on February 26, 2026
With the proper care, a tooth that's been treated with a root canal can last a lifetime. However, while this treatment is over 95% successful, there is a remote possibility that your dentist will recommend that you have yours redone.
How do you know if a root canal needs to be redone?
The signs of a root canal failure may include:
- Sensitivity when biting down.
- A pimple or boil on the jaw.
- Discoloration of the tooth.
- Tenderness in the gum tissue near where the root canal was performed.
- Pain in the tooth you had treated.
- Presence of pus-filled abscesses near the treated tooth.
- Facial or neck swelling.