What alloy is ProTaper Next made from?

ProTaper Next® is manufactured from M-Wire NiTi with m-wire heat treatment.

How many files are in the ProTaper Next sequence?

The ProTaper Next® system includes 6 files: XA, X1, X2, X3, X4, X5.

ProTaper Next® uses continuous rotation motion.

ProTaper Next® is best suited for: off-centered swaggering motion, reduced file engagement, progressive shaping.

Recommended settings: 300 RPM and 2-3 Ncm across the file sequence (refer to official DFU for full per-file parameters).

Dentsply Sirona

Continuous Rotation

ProTaper Next®

Off-centered rectangular cross-section creates swaggering motion for improved debris removal

AlloyM-Wire NiTiFile6VerifiedFeb 2026

Tap icons for term definitions

File	Tip	Taper	Speed rpm	Torque Ncm
XA	0.19	3.5%	300	2-3
	0.17	4%v	300	2-3
	0.25	6%v	300	2-3
	0.30	7%v	300	2-3
	0.40	6%v	300	2-3
	0.50	6%v	300	2-3

Speed: 300 RPM for all files; torque: 2-3 Ncm (per 2025 IFU)

M-Wire NiTi provides greater flexibility and cyclic fatigue resistance vs conventional NiTi (manufacturer data)

Off-centered rectangular cross-section — only two points touch the canal wall at a time, reducing screw-in effect

Patented asymmetric rotary (AR) motion: axis of rotation differs from center of mass, creating swaggering movement

Most canals finish with X1 and X2 only — use X3-X5 only when gauging hand file is loose at WL

Brushing motion away from external root concavities recommended to facilitate flute unloading (per DFU)

Shorter handle than ProTaper Universal for improved posterior accessibility (per US brochure)

For extremely curved canals: use file for single canal only, discard after, consider hand files (per 2025 IFU)

XA accessory file (standard NiTi, 19mm) available for preflaring orifice and improving radicular access

Compatible with ProTaper Next Conform Fit GP, GuttaCore obturators, absorbent points, and size verifiers

Single-use only — do not reprocess or reuse (per IFU)
Contains nickel-titanium — allergic or toxic reactions may occur in sensitive patients (per IFU)
Do not fully immerse in sodium hypochlorite — only working part in max 5% NaOCl concentration (per 2025 IFU)
Do not use in root canals with abrupt apical curvature — heightened risk of separation; use pre-curved hand files instead (per IFU)
Inspect for deformation (bent, unwound), breakage, corrosion, damaged cutting edges before each use — discard if defective
For extremely curved canals: use a new file per canal (single canal use) to reduce breakage risk (per 2025 IFU)
In severe curvatures: use the system manually; machine-driven use not recommended in abrupt apical curvatures — use pre-curved hand files apically (per 2025 IFU)