Endodontic Retreatment

With proper care, most teeth that have had endodontic treatment can last as long as other natural teeth. In some cases, however, a tooth that has received endodontic treatment fails to heal or the pain continues. Occasionally, the tooth becomes painful or diseased months or even years after successful treatment. If your tooth has failed to heal or has developed new problems, you have a second chance. Another endodontic procedure may be able to save your tooth.

Improper healing may be caused by one or more of the following:

  • Curved or narrow canals were not treated during the initial treatment.
  • Complicated canals went undetected during the initial treatment.
  • The crown or restoration was not placed within the appropriate amount of time following the procedure.
  • The crown or restoration did not prevent saliva from contaminating the inside of the tooth.

In some cases, new problems can influence a tooth that was successfully treated, such as the following:

  • New decay can expose a root canal filling material, causing infection.
  • A cracked or loose filling or crown can expose the tooth to new infection.

Once retreatment has been selected as a solution to your problem, we will reopen your tooth to gain access to the root canal filling material. This restorative material will be removed to enable access to the root canal. The doctors will now clean your canals and carefully examine the inside of the problematic tooth. Once cleaned, the doctors will fill and seal the canals and place a temporary or permanent filling in the tooth. At this point, you will need to return to your dentist as soon as possible in order to have a new crown or restoration placed on the tooth to restore full functionality.

We will place a permanent or temporary filling, you may need a new crown or restoration if necessary

Endodontic Retreatment FAQs

  • What is endodontic retreatment?

    Endodontic retreatment is a procedure performed on a tooth that has previously received root canal therapy but has not healed properly or has developed new problems. During retreatment, the old filling materials are removed, the canals are cleaned and disinfected again, and the space is refilled and sealed to promote renewed healing.

  • Why would a tooth need retreatment?

    This will vary depending on the procedure and tooth. 

  • How is retreatment different from a regular root canal?

    Retreatment revisits an already treated tooth. The process involves removing existing filling material (gutta-percha), carefully re-cleaning and reshaping the canals, and resealing them — often with the aid of advanced magnification and imaging to locate previously missed anatomy.

  • How do I know if my previous root canal failed?

    Unless specifically told by our office, you can drive on your own.

  • Can a tooth that has been retreated fail again?

    While no treatment offers a 100% guarantee, retreatment success rates are high — typically above 85–90%. Proper restoration, hygiene, and follow-up greatly improve long-term outcomes.

  • Who performs endodontic retreatment?

    Unless specifically told by our office, there are no restrictions on the day of your appointment.  Much like a filling, you should be very careful with hot liquids or with biting/chewing until the numbness subsides.

  • Is retreatment painful?

    No. The procedure is done under local anesthesia, ensuring your comfort throughout. Most patients report that retreatment feels similar to having a standard root canal.

  • How long does endodontic retreatment take?

    The price will vary depending on the procedure and tooth. 

  • Will I need a new crown after retreatment?

    Yes, in many cases. A new crown or restoration helps protect the tooth and prevent reinfection. Your endodontist and restorative dentist will coordinate to ensure a proper seal and natural appearance.

  • What should I expect after retreatment?

    We do not have in-house payment plans.  Your estimated responsibility will be collected on the day of service.

  • How soon can I return to normal activities?

    Most patients return to work or school the same day or the next. You should follow any specific post-operative instructions provided by your endodontist.

  • How do I care for my tooth after retreatment?

    Maintain good oral hygiene — brushing, flossing, and attending regular checkups. If you experience swelling, discomfort beyond a few days, or new symptoms, contact your endodontist promptly.

  • What are my options if retreatment isn’t possible?

    If retreatment cannot resolve the issue, your endodontist may recommend an apicoectomy (a minor surgical procedure to clean the root tip) or extraction followed by an implant or bridge. However, preserving your natural tooth is usually the best option when possible.

  • How successful is endodontic retreatment?

    With modern technology and proper care, retreatment outcomes are excellent — most patients keep their retreated tooth for many years, often for life.

  • Is retreatment worth it compared to extraction?

    In most cases, yes. Keeping your natural tooth helps maintain normal chewing function and jaw alignment, and is typically less invasive and more affordable than replacement options.