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 Concept

# Smear Layer

## Definition

An amorphous layer of organic and inorganic debris created on the canal wall during instrumentation. Removing it — commonly with EDTA followed by sodium hypochlorite — can improve sealer penetration into dentinal tubules.

## Clinical Guides

[Irrigation Protocols](https://endo-guide.app/irrigation)

## Related Terms

[Taper](https://endo-guide.app/glossary/taper)[Tip Size](https://endo-guide.app/glossary/tip-size)[Cyclic Fatigue](https://endo-guide.app/glossary/cyclic-fatigue)[Torsional Resistance](https://endo-guide.app/glossary/torsional-resistance)[Glide Path](https://endo-guide.app/glossary/glide-path)[Working Length](https://endo-guide.app/glossary/working-length)

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