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 Technique

# Passive Ultrasonic Irrigation (PUI)

## Definition

An irrigant activation method in which an ultrasonically driven file or tip agitates the irrigant in the canal without cutting dentin. The acoustic streaming it creates can help disrupt biofilm and remove debris from areas that a syringe rinse may not reach. It is typically used as a final activation step after canal shaping.

## Clinical Guides

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

## Related Terms

[Single-Cone Obturation](https://endo-guide.app/glossary/single-cone)[Warm Vertical Compaction](https://endo-guide.app/glossary/warm-vertical)[Apical Gauging](https://endo-guide.app/glossary/apical-gauging)[Apical Patency](https://endo-guide.app/glossary/patency)[Tug-Back](https://endo-guide.app/glossary/tug-back)[Pecking Motion](https://endo-guide.app/glossary/pecking-motion)

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