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 Concept

# Master Cone

## Definition

The primary gutta-percha cone selected to match the size and taper of the final apical preparation. Its fit is typically verified by tactile resistance (tug-back) and a radiograph at working length before the canal is obturated.

## Clinical Guides

[Obturation Techniques](https://endo-guide.app/obturation)

## 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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