Cyclic fatigue and fracture surfaces evaluation of different nickel titanium endodontic files | ||||
Egyptian Dental Journal | ||||
Article 11, Volume 67, Issue 1 - January (Conservative Dentistry and Endodontics), January 2021, Page 883-891 PDF (1.83 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/edj.2020.50569.1352 | ||||
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Authors | ||||
Omar Khaleefah 1; Ahmed A El-Souda1; Amany El-Said Badr 2 | ||||
1Department of Endodontic, Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||||
2Head of Department of Endodontic, Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||||
Abstract | ||||
ABSTRACT Introduction: This study compares the cyclic fatigue resistance of files made of gold technology, such as ProTaper Gold F2 and WaveOne Gold Primary files, and files made of M-Wire technology, such as ProTaper Next X2 and WaveOne files. Materials and Methods: A total of 45 files were used in this study, which were classified into 4 groups. Cyclic fatigue tests were conducted using a cyclic loading testing machine, with an artificial canal made of stainless steel (angle of curvature: 45°; curvature radius: 5 mm). All rotary instruments were allowed to reciprocate and rotate until complete fracture, and the fracture time was recorded in seconds using a stop watch. To prevent human error, the experiments were also video-recorded. Results: Gold-Wire files (WaveOne Gold and ProTaper Gold) demonstrated longer time to fracture than that M-Wire files (WaveOne and ProTaper Next) (P < 0.005). In addition, WaveOne files showed more time to fracture than ProTaper Next files (P < 0.005). Fracture surface evaluation coincide with our results. Conclusions: Under the conditions of this study, the gold alloy files resisted cyclic fatigue better than the M-Wire alloy files, In addition, WaveOne files resist cyclic fatigue better than ProTaper Next files. | ||||
Keywords | ||||
Keywords: Cyclic fatigue; scanning electron microscopy; voids; Gold technology; M-wire | ||||
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