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Cyclic fatigue resistance of different continuous rotation and reciprocating endodontic systems
Fabio de Almeida-Gomes1, Humberto Ramah Menezes de Matos2, Rodrigo Ferreira Lopes Arrais Nunes1
1Department of Endodontic, University of Fortaleza (UNIFOR), Fortaleza, Ceará, Brazil.
Objective:
The objective of this study is to compare the cyclic fatigue resistance of nine types of endodontic instruments of nickel-titanium.
Materials And Methods:
Five files of 25 mm of length of each group: Reciproc (RC) R25; WaveOne (WO) Primary; Unicone (UC) L25 25/0.06; K3XF 25/0.06; ProTaper Universal F2 (PTF2); ProTaper Next X2 (PTX2); Mtwo 25/0.06; BioRaCe 25/0.06; One Shape L25 25/0.06 were subjected to a cyclic fatigue resistance test on a mechanical apparatus. The mean fracture time was analyzed statistically by one-way analysis of variance and Tukey's honest significant difference post hoc test, with significance set at P< 0.05.
Conclusion:
It was observed that the groups PTX2, RC, R25, UC L25 25/0.06, and WO Primary presented greater cyclic fracture resistance than the other groups (P< 0.001).
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