Cyclic Fatigue and Torsional Strength of a New Thermally Treated Reciprocating System
Marco Antonio Zaiden Loureiro1, Pedro Henrique Souza Calefi2, Thalles Eduardo Ribeiro1, Rodrigo Ricci Vivan2, Marco Antonio Hungaro Duarte2, Patrícia Correia de Siqueira1, Daniel De Almeida Decurcio11Department of Oral Science, Federal University of Goiás, Faculty of Dentistry, Goiânia, Brazil2Department of Dentistry, Endodontics and Dental Materials, University of São Paulo, Bauru Faculty of Dentistry, Bauru, Brazil
Objective: This study evaluated the resistance to cyclic fatigue and the torsional strength of Prima One Gold® and WaveOne Gold® reciprocating systems.
Methods: Cyclic fatigue was tested in an artificial canal with 60º curvature, a 5 mm radius of curvature at 22°C (n=10) and 36.5°C (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 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)
Corresponding Author: Daniel De Almeida Decurcio
Manuscript Language: English
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