Evaluation of cyclic flexural fatigue of M-wire nickel-titanium rotary instruments.

Introduction: This study was conducted to investigate cyclic flexural fatigue resistance of GT series X rotary files made from the newly developed M-wire nickel-titanium alloy compared with GT and Profile nickel-titanium files made from a conventional nickel-titanium alloy.

Methods: Fifteen files, size 30/0.04, of each type were used to evaluate the cyclic flexural fatigue resistance.