# TruNatomy vs ZenFlex

Dentsply Sirona · Kerr Dental

[TR](https://endo-guide.app/tr/compare/trunatomy-vs-zenflex)

## TruNatomy®

Dentsply Sirona

True, Natural, Anatomy

[View protocol →](https://endo-guide.app/system/trunatomy)

## ZenFlex™

Kerr Dental

Controlled Memory Precision

[View protocol →](https://endo-guide.app/system/zenflex)

Clinical Tip

Both aim at conservative shaping at 500 RPM. TruNatomy uses regressive tapers with a 0.8 mm maximum flute diameter and a uniform 1.5 Ncm across its Glider and Small/Prime/Medium/Large files; ZenFlex uses constant .04/.06 tapers with a 1 mm flute diameter, controlled-memory wire and torque set per file. Choose TruNatomy for the slimmer regressive design and single setting, ZenFlex for constant-taper size selection and pre-bendability.

## Specifications

| — | TruNatomy | ZenFlex |
| --- | --- | --- |
| Manufacturer | Dentsply Sirona | Kerr Dental |
| Alloy | Heat-Treated NiTi | Heat-Treated NiTi (Controlled Memory) |
| Heat Treatment | Other | CM-Wire |
| Motion | Continuous Rotation | Continuous Rotation |
| Files | 6 | 10 |
| Taper | Variable | 4%, 6% |
| Cross-section | Off-centered parallelogram, Centered parallelogram (2 cutting edges) | Triangular |
| Speed | 500 RPM | 500 RPM |
| Torque | 1.5 Ncm | 1–3.5 Ncm |
| Use Type | Single-use | Single-use |

## Best For

TruNatomy

dentin preservationconservative accessminimally invasive

ZenFlex

minimally invasive shapingcontrolled-memory flexibilitydual taper strategy (.04/.06)

## Key Features

TruNatomy

Slim 0.8mm MFD with off-centered parallelogram cross-section preserves peri-cervical dentin while maintaining shaping efficiency

ZenFlex

Violet oxide surface with 1mm flute diameter for minimally invasive shaping and excellent flexibility

[TruNatomy Full protocol](https://endo-guide.app/system/trunatomy)[ZenFlex Full protocol](https://endo-guide.app/system/zenflex)

## Related Clinical Links

Manufacturer pages

[Dentsply Sirona Systems](https://endo-guide.app/manufacturer/dentsply-sirona)[Kerr Dental Systems](https://endo-guide.app/manufacturer/kerr)

Motion categories

[Continuous Rotation](https://endo-guide.app/category/continuous-rotation)

Related comparisons

[TruNatomy vs ProTaper Gold](https://endo-guide.app/compare/protaper-gold-vs-trunatomy)[TruNatomy vs ProTaper Next](https://endo-guide.app/compare/protaper-next-vs-trunatomy)[TruNatomy vs ProTaper Ultimate](https://endo-guide.app/compare/protaper-ultimate-vs-trunatomy)[ZenFlex vs EdgeFile X7](https://endo-guide.app/compare/edgefile-x7-vs-zenflex)[ZenFlex vs K3XF](https://endo-guide.app/compare/k3xf-vs-zenflex)[ZenFlex vs One Curve](https://endo-guide.app/compare/one-curve-vs-zenflex)

Independent educational reference. Always consult official manufacturer Instructions for Use (DFU) before clinical procedures.

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Reviewed by

Uzm. Dt. Levent Yüksel

DDS · Endodontist

Endodontist — DDS, Hacettepe University; endodontics specialty training, Ankara University. 10+ years of clinical experience. Sole author and reviewer of EndoGuide content.

[About the author](https://endo-guide.app/about)[Editorial policy](https://endo-guide.app/editorial-policy)[Clinical profile](https://drleventyuksel.com/)

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