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Abstract
Aim: The objectives of this study were to evaluate and compare the cyclic fatigue resistance (CFR) of TruNatomy (TRN) and WaveOne Gold (WOG) nickel–titanium files subjected to continuous rotary and reciprocating motions. Methods: Forty files were divided into two groups which were further divided into two subgroups where Group 1A and Group 2A consisted of 10 samples having size 26, 4% taper TRN files and 25, 7% taper WOG files, respectively, with each file subjected to rotary motion, whereas Group 1B and Group 2B consisted of 10 samples having size 26, 4% taper TRN files and 25, 7% taper WOG files, respectively, with each file subjected to reciprocation motion. All files were tested for cyclic fatigue in the customized model made of stainless steel having an angle of curvature of 60° and a radius of curvature of 3 mm. Results: Highest resistance to cyclic fatigue was obtained from WOG files subjected to reciprocating motion followed by TRN files subjected to reciprocating motion and TRN files subjected to rotary motion. Least resistance to cyclic fatigue was obtained from WOG files subjected to rotary motion. Conclusion: Using files in reciprocating motion enhances their CFR and TRN files showed more resistance to cyclic fatigue than WOG files in continuous rotation motion.
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