Comparative Evaluation of Three File Systems for Shaping Curved Canals: An Approach.

Aim: To compare and evaluate the shaping ability of ProTaper Next, TruNatomy, and Flexer heat activation rotary files in simulated curved canals.

Materials And Methods: Forty-five severely curved simulated canals in resin blocks were prepared to an apical size of 25 using the following systems (n = 15 per group): ProTaper Next, TruNatomy, and Flexer heat activation. Composite images were made from the superimposition of pre- and post-instrumentation images.