E-ISSN 2548-0839
Cyclic fatigue and torsional strength of a new thermally treated reciprocating system [Eur Endod J]
Eur Endod J. Ahead of Print: EEJ-88700 | DOI: 10.14744/eej.2022.88700

Cyclic fatigue and torsional strength of a new thermally treated reciprocating system

Marco Loureiro1, Pedro HenriqueSouza Calefi2, Thalles Eduardo Ribeiro1, Rodrigo Vivan2, Marco AntonioHungaro Duarte2, Patrícia Correia de Siqueira1, Daniel Decurcio1
1School of Dentistry, Federal University of Goiás, Goiânia, Brazil
2Bauru School of Dentistry, University of São Paulo, Bauru, Brazil

Objective: This study evaluated the resistance to cyclic and torsional strength of Prima One Gold and WaveOne Gold reciprocating systems. Methods: Cyclic fatigue was tested in an artificial canal with 60º curvature, 5 mm radius of curvature at 22ºC (n = 10) and 36.5ºC (n = 10). The torsional strength test followed ISO 3630-1, measuring torque and deflection angle until fracture (n = 10). The t-test was used to compare the two groups, and the significance level was set at 5%. Results: The Prima One Gold group presented greater resistance to cyclic fatigue at room temperature (p = 0.001) and at body temperature (p <0.001). For the torsional resistance test, the Prima One Gold group had a lower maximum torque value (p = 0.029), despite having a greater deflection angle (p <0.001). Conclusion: The Prima One Gold group showed greater resistance to cyclic fatigue regardless of temperature and a greater deflection angle. The WaveOne Gold group showed a greater maximum torque value than the Prima One Gold group. (EEJ-2021-05-087)

Keywords: Alloys, Mechanical Tests, Shape Memory Alloys, Root Canal Preparation.



Corresponding Author: Daniel Decurcio
Manuscript Language: English
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