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 Concept

# Apical Periodontitis

## Definition

Inflammation of the tissues around the root apex, usually a response to bacteria within an infected or necrotic canal system. It may be symptomatic (tenderness to percussion or biting) or detected only as a radiolucency on imaging. Management generally centers on disinfecting the canal through root canal treatment or, where indicated, retreatment or surgery.

## Clinical Guides

[Failed Root Canal](https://endo-guide.app/failed-root-canal-retreatment)[Tooth Resorption](https://endo-guide.app/tooth-resorption)[Pain After Root Canal](https://endo-guide.app/post-root-canal-pain)

## Related Terms

[Vital Pulp Therapy](https://endo-guide.app/glossary/vital-pulp-therapy)[Sodium Hypochlorite (NaOCl)](https://endo-guide.app/glossary/naocl)[EDTA](https://endo-guide.app/glossary/edta)[Smear Layer](https://endo-guide.app/glossary/smear-layer)[Gutta-Percha](https://endo-guide.app/glossary/gutta-percha)[Bioceramic Sealer](https://endo-guide.app/glossary/bioceramic-sealer)

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