Abstract
The aim of this study was to evaluate the torsional and bending resistance of Nickel-Titanium (NiTi) instruments used for cervical flaring during root canal preparation. For this study, it will be used a total of 100 NiTi rotary instruments (n=20): Sx Protaper Universal, Orifice Shaper Mk Life 17.08, Orifice Shaper Blue Mk Life 17.12, Mtwo 25.07 e Orifice Shaper Wizard Navigator 25.12. Th…