NiTi Alloy

# CM-Wire (Controlled Memory)

Controlled Memory Wire (CM-Wire) undergoes a specialized heat treatment at 450–550°C that dramatically alters the shape-memory behavior of NiTi. The result is an alloy with near-zero shape memory at room and body temperatures: unlike conventional or M-Wire NiTi, CM-Wire files can be bent by hand and retain the deformed shape permanently, much like stainless steel. This property makes them ideal for pre-bending to match canal curvature before insertion. Despite the loss of shape memory, CM-Wire maintains excellent superelastic flexibility and offers substantially greater cyclic fatigue resistance than conventional NiTi. Files can often be regenerated (returned to original shape) by autoclaving.

## Metallurgical Properties

Af Temperature45–55°C

Phase at 37°CMartensite (near-zero shape memory)

FlexibilityVery High (pre-bendable, retains set)

Cyclic FatigueUp to 300–700% greater than conventional

[Compare all heat treatments→](https://endo-guide.app/alloy/heat-treatment-comparison)

## Systems Using CM-Wire (Controlled Memory)

[### HyFlex EDM Coltene Rotary CM-Wire · variable · 8 files Controlled Memory](https://endo-guide.app/system/hyflex-edm)[### HyFlex CM Coltene Rotary CM-Wire · 4% · 6 files Controlled Memory](https://endo-guide.app/system/hyflex-cm)[### ZenFlex Kerr Dental Rotary Heat-Treated · 4-6% · 10 files Controlled Memory Precision](https://endo-guide.app/system/zenflex)[### ProDesign Logic Easy Equipamentos (MK Life) Rotary Controlled · 3% / 5% · 10 files Controlled Memory Flexibility](https://endo-guide.app/system/prodesign-logic)[### HyFlex GPF Coltene Rotary CM-Wire · 1-2% · 3 files Controlled Memory Glide Path Files](https://endo-guide.app/system/hyflex-gpf)[### NIC MH NIC Dental (Shenzhen Superline Technology) Rotary MaxTech · .04/.06 constant · 14 files CM-Wire Constant Taper](https://endo-guide.app/system/nic-mh)

## Related Clinical Links

NiTi collections

[Controlled-Memory Files](https://endo-guide.app/niti-files/controlled-memory-files)[Glide Path Files](https://endo-guide.app/niti-files/glide-path-files)[Rotary Systems](https://endo-guide.app/niti-files/rotary-file-systems)[Single-Use Systems](https://endo-guide.app/niti-files/single-use-niti-files)

Clinical use cases

[Severe Curvature](https://endo-guide.app/use-case/severe-curvature)

Related alloys

[Gold Heat Treatment](https://endo-guide.app/alloy/gold)[Blue Heat Treatment](https://endo-guide.app/alloy/blue)[C.Wire (Controlled Memory)](https://endo-guide.app/alloy/c-wire)[EDM Process (Electrical Discharge Machining)](https://endo-guide.app/alloy/edm)

![Uzm. Dt. Levent Yüksel](https://endo-guide.app/images/levent-yuksel.jpg)

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/)

[Back to all systems](https://endo-guide.app/)

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