Corrosion resistance assessment of nickel-titanium endodontic files with and without heat treatment.

Objectives: The aim of this study was to evaluate the corrosion resistance of heat-treated (Reciproc and WaveOne) and non-heat-treated (ProTaper and Mtwo) superelastic nickel-titanium endodontic files when immersed in a 5.25% sodium hypochlorite solution.

Materials And Methods: Anodic polarization curves were obtained with potential sweeps that began at the open circuit potential or corrosion potential (E).