Management of Severe Curvatures in Root Canal Treatment with the New Generation of Rotating Files Using a Safe and Predictable Protocol

The goal of modern endodontics is to eliminate or reduce bacterial load inside the endodontic space, which is possible by performing adequate shaping and three-dimensional cleansing followed by filling with thermoplasticized gutta-percha [1 5]. The first phase, the shaping, is carried out using hand stainlesssteel files and rotating Ni-Ti files [6, 7]. The clinical introduction of Ni-Ti files presented a turning point in the history of endodontics. Moreover, it allowed the production of new endodontic instruments, both manual and rotating, with better features than stainless steel ones [8]. This invention led to the achievement of more effective and reproducible results. Ni-Ti alloys, used in dentistry, have a rational atomic composition of Ni-Ti, consisting of 55% of Ni and 45% of Ti [9, 10].