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Year : 2019  |  Volume : 9  |  Issue : 1  |  Page : 27-31

Cyclic fatigue life assessment of a M-Wire nickel-titanium reciprocating file in a 90° canal curvature: An in vitro study

1 Department of Conservative Dentistry and Endodontics, Meenakshi Ammal Dental College and Hospital, Chennai, Tamil Nadu, India
2 Central Research Department, Meenakshi Academy of Higher Education and Research, Chennai, Tamil Nadu, India

Correspondence Address:
Dr. L Karthik
Meenakshi Academy of Higher Education and Research, Chennai - 600 078, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijmd.ijmd_23_19

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Objective: The aim of this study is to assess the cyclic fatigue life of WaveOne Gold and WaveOne files in a reciprocating motion using a dynamic testing model. In addition, the present study was also employed to assess the mode of fracture under scanning electron microscope. Study Design: A total of 24 new reciprocating files were divided into two groups where Group I consisted of 12 samples of size 25, 0.07 taper WaveOne Gold and Group II consisted of 12 samples of size 25, 0.08 taper WaveOne files. After the initial inspection, all the files were subjected to cyclic fatigue testing fabricated with a 90° angle of curvature and a 5 mm radius. Results: The mean time to fracture for WaveOne Gold and WaveOne was found to be 268.33 and 210.92 s, respectively. There was a statistically significant difference between the WaveOne Gold and WaveOne groups in reciprocating motion. The mean length of the fractured segment of WaveOne Gold and WaveOne were also calculated where the difference was found to be statistically significant. Conclusion: WaveOne Gold reciprocating files were found to be more resistant and performed better to cyclic fatigue than WaveOne file in a 90° canal curvature.

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