What is retreatment?
Further treatment of the canal system in a tooth that has already had root canal treatment.
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Why might root canal treatment be repeated?
Root canal retreatment treats the inside of a tooth that has already had root canal treatment. It may be considered if disease persists or develops again. The cause is assessed first.
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A treated tooth needs reassessment
Inflammation can persist after root canal treatment or develop again later. Possible reasons include hard-to-reach canals or a leaking seal at the top of the tooth.
Accessing the canals again through the tooth
During retreatment, the tooth is reopened. Old root fillings are removed, the canals cleaned again, then refilled and sealed.
Preserving the tooth is considered individually
Access, tooth condition and the cause all influence the decision. Retreatment is not suitable for every tooth. Options, limitations and follow-up checks are discussed.
At a glance
When may it be considered?
When disease persists or develops again, if the findings and access support this approach.
What are the basic steps?
Old canal fillings are removed and the canals cleaned, filled and sealed again. The tooth then needs a suitable permanent seal at its crown end.
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Often confused
Retreatment or apicectomy?
Retreatment treats the canal system again through the crown of the tooth. An apicectomy uses surgical access to the root tip.
Quick answers
Must a root-treated tooth be extracted if it causes symptoms?
Not automatically. An examination first assesses whether further treatment is appropriate and technically possible.
Is retreatment the same as an apicectomy?
No. Retreatment accesses the canal system through the tooth. An apicectomy accesses the root tip surgically.
Why can retreatment be more complex?
Existing filling materials and sometimes build-ups must be accessed or removed. The shape and accessibility of the canals also matter.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
What explains the new findings in my root-treated tooth, and what options are there to preserve it?
The practice profile lists endodontics as an area of continuing education; treatment options are discussed on the basis of an examination.
Symptoms in a previously root-treated tooth can be examined, and possible next steps discussed in person.
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Build on the simple explanation with clinical terms, key distinctions and a knowledge question.
- Endodontic retreatment
- Further treatment of the canal system in a tooth that has previously had root canal treatment.
- Orthograde access
- Access to the root canals through the crown of the tooth.
- Coronal seal
- A seal at the crown end of the tooth, for example provided by a suitable build-up.
Know the difference
Retreatment and apicectomy use different approaches. New pain alone establishes neither the cause nor which procedure is appropriate.
Sources and context
Editorial research: 23 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.