What is it?
One stage of professional root canal treatment.
← All explanationsRoot canal filling
What does a root canal filling seal?
A root canal filling occupies the cleaned and prepared canal system inside a tooth. Gutta-percha is often combined with a sealing material. This is one stage of root canal treatment; the tooth also needs a suitable sealed restoration at crown level.
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Cleaning comes first
Before filling, the canal system is accessed, prepared and disinfected. Filling does not replace that cleaning.
Filling the canal space
Suitable materials then fill the prepared space as completely as possible. The root itself remains in the jaw.
Seal the top as well
A filling or other suitable restoration protects the opening through the crown. Follow-up checks assess the tooth and surrounding tissues.
At a glance
When is it considered?
When a diseased canal system is treated and the tooth appears restorable.
What follows?
An appropriate tooth restoration and clinical, where needed radiographic, review.
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Often confused
Root filling or ordinary filling?
A root filling lies inside the canal system. A coronal filling seals and restores the visible crown of the tooth.
Quick answers
Is the filling the entire treatment?
No. Assessment, cleaning, disinfection, filling and subsequent restoration work together.
Does every root-filled tooth need a crown?
That depends on remaining tooth structure, position and loading, among other factors.
Can a filled canal cause problems again?
Yes. Persistent or new symptoms need assessment; retreatment or other care may sometimes be required.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
How will my tooth be restored after root filling, and when will healing be reviewed?
At the practice, findings, personal wishes and possible next steps are discussed through a consultation and examination.
After root canal treatment, a clear plan for restoration and review is useful.
Discuss tooth preservationChoose an appointment on DoctolibLearning for dental trainees & teamsUnderstand clinical terms and build your knowledge
Build on the simple explanation with clinical terms, key distinctions and a knowledge question.
- Obturation
- The technical term for filling and sealing the prepared canal system.
- Gutta-percha
- A rubber-like material commonly used as the core of a root filling.
- Sealer
- A sealing material used together with the core material.
Know the difference
An X-ray can help assess filling length and distribution. It cannot alone prove sterility or permanent healing.
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.