The effect of Cu-doping on the corrosion behavior of NiTi alloy arch wires under simulated clinical conditions

Abstract Allergy to nickel based alloy arch wires, which is largely induced by corrosion behavior, can cause severe problems during the orthodontic treatment. However, no consensus has been reached in comparison of anti-corrosion behavior between Nickel-Titanium (NiTi) and Copper (CuNiTi) wires. Herein, NiTi CuNiTi wires was simultaneously studied artificial saliva under loading stress simulate clinical conditions. Scanning electron microscope (SEM) utilized detect surface morphology following x-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS) as well photoelectron (XPS) were used evaluate potential tendency implying that wire had more defects on yet intriguingly less release Ni compared with after test. Both groups corroded when loaded clinic-simulating stress, nevertheless, doping Cu element reduce some extent, conducive lowering probability metal allergy supplying meaningful instructions for manufactories orthodontists.