NIC® U-Series
Eight-size SX–F5 convex-triangle crown-down sequence in three MaxTech wire tiers with per-wire motor settings — U+ (gold) at 300 RPM with graduated 5.0/1.5/3.0 Ncm torque, U-Blue at 400 RPM, untreated U at 250-300 RPM
Continuous Rotation · MaxTech NiTi (Untreated / Gold / Blue Tiers)rpm
1–5
Ncm
File24Verified
Specifications
Tap icons for term definitions
U+ (MaxTech 3.0 Gold)
0.19 · 4%300 · 5.0
0.18 · 2%300 · 5.0
0.20 · 4%300 · 1.5
0.20 · 7%300 · 1.5
0.25 · 8%300 · 3.0
0.30 · 9%300 · 3.0
0.40 · 4%300 · 3.0
0.50 · 5%300 · 3.0
U-Blue (MaxTech 6.0)
SX0.19 · 4%400 · 3.0
S10.18 · 2%400 · 3.0
S20.20 · 4%400 · 3.0
F10.20 · 7%400 · 3.0
F20.25 · 8%400 · 3.0
F30.30 · 9%400 · 3.0
F40.40 · 4%400 · 3.0
F50.50 · 5%400 · 3.0
U (MaxTech 1.0, Untreated)
SX0.19 · 4%250-300 · 3.0-4.0
S10.18 · 2%250-300 · 3.0-4.0
S20.20 · 4%250-300 · 1.0-1.5
F10.20 · 7%250-300 · 1.5-2.0
F20.25 · 8%250-300 · 2.0-3.0
F30.30 · 9%250-300 · 2.0-3.0
F40.40 · 4%250-300 · 2.0-3.0
F50.50 · 5%250-300 · 2.0-3.0
| File | Tip | Taper | Speed rpm | Torque Ncm |
|---|---|---|---|---|
| U+ (MaxTech 3.0 Gold) | ||||
| 0.19 | 4% | 300 | 5.0 | |
| 0.18 | 2% | 300 | 5.0 | |
| 0.20 | 4% | 300 | 1.5 | |
| 0.20 | 7% | 300 | 1.5 | |
| 0.25 | 8% | 300 | 3.0 | |
| 0.30 | 9% | 300 | 3.0 | |
| 0.40 | 4% | 300 | 3.0 | |
| 0.50 | 5% | 300 | 3.0 | |
| U-Blue (MaxTech 6.0) | ||||
| SX | 0.19 | 4% | 400 | 3.0 |
| S1 | 0.18 | 2% | 400 | 3.0 |
| S2 | 0.20 | 4% | 400 | 3.0 |
| F1 | 0.20 | 7% | 400 | 3.0 |
| F2 | 0.25 | 8% | 400 | 3.0 |
| F3 | 0.30 | 9% | 400 | 3.0 |
| F4 | 0.40 | 4% | 400 | 3.0 |
| F5 | 0.50 | 5% | 400 | 3.0 |
| U (MaxTech 1.0, Untreated) | ||||
| SX | 0.19 | 4% | 250-300 | 3.0-4.0 |
| S1 | 0.18 | 2% | 250-300 | 3.0-4.0 |
| S2 | 0.20 | 4% | 250-300 | 1.0-1.5 |
| F1 | 0.20 | 7% | 250-300 | 1.5-2.0 |
| F2 | 0.25 | 8% | 250-300 | 2.0-3.0 |
| F3 | 0.30 | 9% | 250-300 | 2.0-3.0 |
| F4 | 0.40 | 4% | 250-300 | 2.0-3.0 |
| F5 | 0.50 | 5% | 250-300 | 2.0-3.0 |
Clinical Tips
Motor settings are per wire (manufacturer fact sheet, 2026-08-12): U+ (gold) runs at 300 RPM with graduated torque — 5.0 Ncm for SX and S1, 1.5 Ncm for S2 and F1, 3.0 Ncm for F2–F5; the untreated U tier runs at 250-300 RPM with graduated 1.0-4.0 Ncm torque; U-Blue runs at 400 RPM / 3.0 Ncm (direct manufacturer confirmation, 2026-08). Set the motor for the wire in your hand
Shaping files work with a brushing action on the withdrawal stroke; finishing files work passively without brushing, and are not held at working length longer than about one second (IFU)
Apical gauging is built into the sequence: after each finisher, a matching hand file (020–050) confirms whether the preparation is complete or the next size is needed (IFU)
All three tiers share the same geometry and differ in heat treatment (manufacturer): the untreated U is MaxTech 1.0 conventional NiTi, U+ is MaxTech 3.0 (gold-type, positioned for conventional curvature up to ~15°), and U-Blue is MaxTech 6.0 (blue-type, moderately flexible and pre-bendable, for curvature up to ~30°) — which the fact sheet positions as "more flexible than ProTaper Gold". The available IFU covers the U+ wire
Due to heat treatment the file may appear slightly curved out of the package — the manufacturer states this is not a defect and the file does not need straightening (IFU)
NIC's own cross-reference table positions the untreated U as its ProTaper Universal alternative and U+ as its ProTaper Gold alternative; the finishing-file sizing (20/.07 → 50/.05) mirrors that sequence — a manufacturer-claimed correspondence, not independently verified
S1 is 18/.02 and F4 is 40/.04 in every tier per the manufacturer's consolidated fact sheet (2026-08-12), which is the controlling source where earlier NIC documents differed
SX is a 19 mm orifice shaper; S1–F5 use a 13 mm short shank in 21/25/31 mm lengths; maximum flute diameter is 1.2 mm across the line (fact sheet)
System-matched machine-made gutta-percha and paper points (VTF F1–F5) are offered by the manufacturer; the IFU directs confirming cone fit, tug-back, and radiographic fit before sealer placement
Specifications on this page come from the manufacturer's consolidated fact sheet (2026-08-12, the controlling source), 2026 IFU draft, 2025 catalog, and direct manufacturer confirmations (2026-08); no independent peer-reviewed performance data exists for this system (PubMed, 2026-08-11)
Warnings
- Single-use only per the manufacturer's IFU — reuse may increase the risk of cross-contamination, loss of cutting efficiency, or file separation
- Supplied non-sterile in this version: sterilize before first clinical use (steam autoclave 134 °C, 18 min holding time per the IFU) and discard after the procedure
- Use only in continuous clockwise rotation — the IFU directs against reciprocating motion for these files
- Do not use a file from a damaged package, or any instrument showing deformation, unwinding, corrosion, fracture, or wear (IFU)
- Avoid apical pressure: forcing the file may cause separation, ledging, transportation, or perforation (IFU)
- Contains nickel — the IFU contraindicates use in patients with known nickel/NiTi allergic sensitivity
- The IFU contraindicates mechanical use in canals with severe, sudden apical curvatures, complex canal divisions, or anatomy where safe passive file progression cannot be achieved
Obturation Techniques
Single cone, warm vertical, carrier-based & lateral compaction
Protocol
01Glide Path2
02Shaping3
03Finishing2
Related Systems
From NIC Dental Systems
Manufacturer page
NIC Dental SystemsOther continuous rotation systems
Motion category
Continuous RotationComparisons
Alloy
Blue Heat TreatmentCollections
Clinical guides
Frequently Asked Questions
01What alloy is NIC U-Series made from?
01
What alloy is NIC U-Series made from?
Answer
NIC® U-Series is manufactured from MaxTech NiTi (Untreated / Gold / Blue Tiers) with blue heat treatment.
02How many files are in the NIC U-Series sequence?
02
How many files are in the NIC U-Series sequence?
Answer
The NIC® U-Series system includes 24 files: SX, S1, S2, F1, F2, F3, F4, F5, SX, S1, S2, F1, F2, F3, F4, F5, SX, S1, S2, F1, F2, F3, F4, F5.
03What motion type does NIC U-Series use?
03
What motion type does NIC U-Series use?
Answer
NIC® U-Series uses continuous rotation motion.
04What cases is NIC U-Series best for?
04
What cases is NIC U-Series best for?
Answer
NIC® U-Series is best suited for: familiar SX–F5 graduated shaping sequence, IFU-defined technique with built-in apical gauging, untreated, gold, or blue wire tiers chosen per case.
05What speed and torque settings are recommended for NIC U-Series?
05
What speed and torque settings are recommended for NIC U-Series?
Answer
Recommended settings: 300–400–250-300 RPM and 5.
- 010 / 1.
- 025 / 3.
- 030 / 3.
- 040-4.
- 050 / 1.
- 060-1.
- 075 / 1.
- 085-2.
- 090 / 2.
- 100-3.
- 110 Ncm across the file sequence (refer to official DFU for full per-file parameters).
Reviewed by
Uzm. Dt. Levent Yüksel
DDS · Endodontist
Independently authored and clinically reviewed.
Powered by:Uzm. Dt. Levent Yüksel