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ORIGINAL ARTICLE
Year : 2020  |  Volume : 23  |  Issue : 1  |  Page : 41-45

Comparison of the cyclic fatigue resistance of hyflex EDM, vortex blue, protaper gold, and onecurve nickel–Titanium instruments


1 Department of Endodontics, Faculty of Dentistry, Afyonkarahisar Sağlık Bilimleri University, Afyonkarahisar, Turkey
2 Department of Pedodontics, Faculty of Dentistry, Afyonkarahisar Sağlık Bilimleri University, Afyonkarahisar, Turkey

Correspondence Address:
Dr. A D Uygun
Department of Endodontics, Faculty of Dentistry, Afyonkarahisar Sağlık Bilimleri University, Afyonkarahisar, 03030
Turkey
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/njcp.njcp_343_19

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Objective: This in vitro study aimed to compare the cyclic fatigue resistance of HyFlex EDM (HEDM), Vortex Blue (VB), ProTaper Gold (PG), and OneCurve (OC) nickel–titanium (NiTi) instruments. Materials and Methods: About 12 HEDM (25/.~), 12 VB (25/.06), 12 PG (25/.08), and 12°C (25/.06) instruments were included in this study. All the instruments were tested with a 60° angle of curvature and a 3-mm radius of curvature. All the instruments were utilized until fracture occurred, and then the number of cycles to failure (NCF) was calculated. The data were analyzed statistically using Kruskal–Wallis H and Mann–Whitney U-tests. The statistical significance level was set at P < 0.05. Results: HEDM instruments had the highest cyclic fatigue resistance among all the other instruments (P < 0.05). The OC instruments had a significantly higher fatigue resistance than the PG and VB instruments (P < 0.05); however, there was no significant difference between PG and VB instruments in the NCF (P > 0.05). Conclusion: Within the limitations of this in vitro study, it was found that the cyclic fatigue resistance was higher for the HEDM instruments than for the VB, PG, and OC instruments.


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