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NiTi Alloy

R-Phase NiTi (Twisted)

R-phase NiTi utilizes a thermomechanical twisting process to manufacture files, resulting in a wire with a unique R-phase crystalline structure alongside austenite. The twisted manufacturing method creates compressive surface residual stresses that substantially improve cyclic fatigue resistance compared to conventional ground files. R-phase NiTi has a lower elastic modulus than austenitic NiTi, providing excellent conformability in curved canals. When used in the TF Adaptive system with adaptive motion technology, the stress-sensing motor switches automatically between rotation and reciprocation based on real-time torque feedback, maximizing both efficiency and safety.

Metallurgical Properties

Af Temperature~25–35°C
Phase at 37°CAustenite + R-phase
FlexibilityHigh (twisted fiber structure)
Cyclic FatigueSubstantially improved vs ground files

Systems Using R-Phase NiTi (Twisted)