Dental Endodontic NiTi K-Files Flexible Root Canal Preparation Instruments
Superelastic memory alloy, excellent flexibility and good shaping, 2% ISO taper with square cross-section. Used for root canal enlargement, negotiation, exploration, length measurement, and cleaning. Technique: combined rotation and pull. Operation: clockwise screwing-in → counterclockwise cutting → clockwise withdrawal. Note: gentle manipulation, frequent irrigation, repeated recapitulation, and avoid instrument binding.
Material Advantages
Made of nickel-titanium alloy, this material offers superelasticity, shape memory properties, and excellent flexibility. It forms well, resists displacement, and enables high preparation efficiency.
Design Features
- Handle Marking: Square-shaped marking for easy identification.
Threads: Dense and gentle, reducing resistance and improving follow-through.
Taper: 2% ISO taper, conforming to the anatomical morphology of root canals.
Cross-section: Square, forming four cutting edges for strong cutting power and ample chip space.
Tip: Blunt / non-cutting type, providing smooth guidance and preventing deviation.
Core Functions
Versatile master file for manual root canal preparation. Core functions include root canal enlargement, negotiation, exploration, working length measurement, dentin filing, and canal wall debridement. The combined rotation and pull technique is the fundamental maneuver that makes it a core instrument for hand instrumentation.
Clinical Technique
Clockwise insertion: Gently press and rotate 90–180° clockwise to engage the threads into dentin.
Counterclockwise cutting: Apply light apical pressure while rotating counterclockwise to cut dentin using the reverse cutting edge.
Clockwise withdrawal: Rotate clockwise again to entrap and withdraw dentin debris from the canal.
Note: Use gentle movements, irrigate frequently, recapitulate often, and avoid instrument binding.
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