Dental Endodontic NiTi R‑Files Flexible Root Canal Preparation Instruments
Material Advantages
The NiTi R‑File can withstand high‑temperature and high‑pressure steam sterilization at 135°C under 2 atmospheres. It features superelasticity, shape memory effect and excellent flexibility, with good shaping performance, low canal transportation and high preparation efficiency. In addition, nickel‑titanium alloy endows it with superior fatigue resistance, long‑term durability and corrosion resistance, enabling repeated sterilization and safe reuse.
Design Features
Handle: Triangular marking for easy identification and stable grip
Flutes: Widely spaced with large helical angles, providing ample chip space and reducing binding
Cross-section: Predominantly triangular, offering three-point contact for stable cutting
Tip: Sharp, facilitating easy entry into the root canal orifice and creating a smooth glide path
Taper: 2% ISO taper, preserving the original canal morphology.
Core Functions
Locate root canal orifices – Precisely identify root canal entrances, avoiding omission or misjudgment
Initial negotiation – Establish the initial canal pathway, creating a glide path for subsequent instruments
Open curved canals – Safely explore and navigate curved root canals, guiding subsequent instruments for smooth entry
Clinical Use of NiTi R-File
Gently engage the root canal wall with a clockwise rotation of 1/4 to 1/2 turn, then slowly advance the instrument to the working length and immediately withdraw. Forced up-and-down filing, heavy apical pressure, and counterclockwise rotation are strictly prohibited. Repeat 2–3 times per instrument size, clean debris, then proceed to the next size.
FAQ