One Curve®
Micro-Mega (COLTENE)
Micro-Mega (COLTENE)
One Curve®
Controlled-memory single-file rotary system with variable cross-section for full canal shaping
Continuous Rotation · C.Wire NiTi
rpm
2.5
Ncm
File
4
Verified
Feb 2026
Specifications
Tap icons for term definitions
25/.060.25 · 6%Shaping2.5Ncm
25/.040.25 · 4%Shaping2.5Ncm
35/.040.35 · 4%Finishing2.5Ncm
45/.040.45 · 4%Finishing2.5Ncm
| File | Tip | Taper | Speed rpm | Torque Ncm | Role |
|---|---|---|---|---|---|
| 25/.06 | 0.25 | 6% | 300 | 2.5 | Shaping |
| 25/.04 | 0.25 | 4% | 300 | 2.5 | Shaping |
| 35/.04 | 0.35 | 4% | 300 | 2.5 | Finishing |
| 45/.04 | 0.45 | 4% | 300 | 2.5 | Finishing |
Matching gutta-percha & paper points
- Gutta-percha
- One Curve Gutta-PerchaClassic 25/.06, mini 25/.04, mini 35/.04, mini 45/.04
- Paper points
- One Curve Paper PointsClassic 25/.06, mini 25/.04, mini 35/.04, mini 45/.04
Clinical Tips
Same motor settings for all files: 300 RPM, 2.5 Ncm
C.Wire controlled-memory alloy allows pre-bending for difficult access
Variable cross-section design for optimized cutting and debris removal
Single-file system: one instrument shapes the full canal in most cases
No sucking-in effect during use — smooth cutting action
Mini variant available with smaller 1mm wire diameter for restricted access
Compatible with One Flare (coronal flaring) and One G (glide path) ecosystem
Warnings
- Single-use only — sterile, pre-packaged, do not reprocess
- Contains nickel — do not use on patients with nickel allergy
- Always establish glide path before rotary shaping
- Inspect for deformation before use — discard if any signs of damage
- Do not leave file rotating at working length for extended periods
- Not recommended for severely calcified canals without prior negotiation
Obturation Techniques
Single cone, warm vertical, carrier-based & lateral compaction
Protocol
01Glide Path2
02Shaping1
03Finishing3
Related Systems
Manufacturer page
Micro-Mega (COLTENE) SystemsOther continuous rotation systems
Motion category
Continuous RotationComparisons
Clinical guides
Frequently Asked Questions
01What alloy is One Curve made from?
01
What alloy is One Curve made from?
Answer
One Curve® is manufactured from C.
- 01Wire NiTi with c-wire heat treatment.
02How many files are in the One Curve sequence?
02
How many files are in the One Curve sequence?
Answer
The One Curve® system includes 4 files: 25/.
- 0106, 25/.
- 0204, 35/.
- 0304, 45/.
- 0404.
03What is the One Curve file sequence?
03
What is the One Curve file sequence?
Answer
One Curve® is used in this order: 25/.
- 0106 → 25/.
- 0204 → 35/.
- 0304 → 45/.
- 0404.
- 05Per-file speed, torque and technique are in the protocol section above.
04What motion type does One Curve use?
04
What motion type does One Curve use?
Answer
One Curve® uses continuous rotation motion.
05What cases is One Curve best for?
05
What cases is One Curve best for?
Answer
One Curve® is best suited for: single-file rotary simplicity, controlled-memory flexibility, pre-bendable for difficult access.
06What speed and torque settings are recommended for One Curve?
06
What speed and torque settings are recommended for One Curve?
Answer
Recommended settings: 300 RPM and 2.
- 015 Ncm across the file sequence (refer to official DFU for full per-file parameters).
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.
Cite this page
Citation formats for the manufacturer-verified specification data on this page.
AMA
Yüksel L. One Curve: sequence, speed and torque settings. EndoGuide. Updated: 2026-09-15. https://endo-guide.app/system/one-curve
BibTeX
@misc{endoguide-one-curve,
author = {Yüksel, Levent},
title = {One Curve: sequence, speed and torque settings},
howpublished = {\url{https://endo-guide.app/system/one-curve}},
year = {2026},
note = {EndoGuide. Updated: 2026-09-15}
}Powered by:Uzm. Dt. Levent Yüksel
@endoguideappIndependent educational resource. Product names and trademarks belong to their respective manufacturers, who neither sponsor nor endorse EndoGuide.