#45 x 21mm Pac-File NiTi Rotary File with 0.04 Taper – 6/Pack (FNT210445)

• Featuring a 0.04 constant taper, an ISO size #45 tip diameter, and a short 21mm working length, this file provides maximum cutting volume and control in confined posterior spaces

• Comparable to K3, Vortex, HyFlexNT, Endosequence

Uses

• Final Master Apical Enlargement:

• Functions as a large master file to complete the mechanical instrumentation of wide root canal configurations

• Posterior Molar Procedures:

• Optimized for use in molar root networks where limited jaw openings restrict access, allowing the 21mm shaft to bypass collision with opposing dental arches

• Straight and Calcified Canal Clearing:

• Safely shapes large, straightforward paths and aggressively removes persistent calcified obstacles

• Gutta-Percha Extraction:

• Operates as a robust mechanical extraction tool during retreatment to grab, break up, and evacuate old obturation material

• Rotary Sequence Integration:

• Fits cleanly into engine-driven endodontic techniques structured around constant-taper sequences

• Universal Handpiece Integration:

• Operates reliably across all common rotary endodontic techniques designed for constant-taper sequences

Features

• Super-Elastic USA NiTi Alloy:

• Manufactured from premium American nickel-titanium alloy, maintaining high flexibility despite a thicker size #45 core structure

• Size #45 Tip Geometry:

• Outfitted with an ISO standard 0.45mm tip combined with a continuous 0.04 taper for highly uniform canal widening

• No-Rebound Pre-Bending:

• The advanced metallurgy enables manual pre-bending to enter stubborn orifices safely without a spring-back reaction

• Flute Unwinding Visual Safety:

• Under excessive torsional stress or binding, the metallic flutes unwind rather than snapping instantly. This provides an obvious visual warning to discard the file

• Silver Identifier Handle:

• Built with a standardized silver-plated handle to identify its membership in the 0.04 taper family at a glance

• Industry Compatibility:

• Comparable in function to systems like K3, Vortex, HyFlex NT, and Endosequence

Benefits

• Protects Against Broken Instruments:

• Highly resistant to cyclical fatigue failure caused by repetitive flexing inside the root structure

• Maintains Natural Roots Paths:

• Stays safely centered on the original pathway. This minimizes structural failures like ledge formation, zipping, transportation, or wall perforation

• Aggressive Cutting Performance:

• The wide profile cuts through tough dentin walls quickly, minimizing total clinical chair time and improving patient comfort

• Direct System Compatibility:

• Serves as a seamless clinical alternative to market-leading file sequences like K3, Vortex, HyFlexNT, and Endosequence without needing adjustments to pre-set motor settings