Cyclic Fatigue Resistance of Blue Heat-Treated Instruments at Different Temperatures.

Autor: Vieira TM; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Cardoso RM; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Alves NCC; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Emanuel Acioly Conrado de Menezes S; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Batista SM; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Silva SA; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Velozo C; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., de Albuquerque DS; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil., Monteiro GQM; Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Zip Code 54756-220, Brazil.
Jazyk: angličtina
Zdroj: International journal of biomaterials [Int J Biomater] 2021 Jul 30; Vol. 2021, pp. 5584766. Date of Electronic Publication: 2021 Jul 30 (Print Publication: 2021).
DOI: 10.1155/2021/5584766
Abstrakt: The main aim is to evaluate the cyclic fatigue resistance of blue heat-treated instruments with different kinematics. Twenty-four endodontic instruments of the same brand were used for each of three experimental groups: VB (Vortex Blue 40/0.04), RB (RECIPROC Blue 40/0.06), and XB (X1 Blue 40/0.06). The instruments were randomly distributed and subjected to temperatures of 20°C and 37°C. The fatigue test was performed using a stainless steel device. Data were analysed using the Shapiro-Wilk test, Student's t- test, the F test, and Tukey's and Tamhane tests at significance level P =0.05. The instruments' cyclic fatigue resistance at both temperatures differed significantly for each instrument type ( P < 0.001). The RB instruments displayed greater cyclic fatigue resistance at the tested temperatures compared with the VB and XB instruments ( P < 0.001). Reciprocating kinematics positively influenced cyclic fatigue resistance. Blue heat-treated instruments showed decreased cyclic fatigue resistance as the temperature increased ( P < 0.001).
Competing Interests: The authors declare that they have no conflicts of interest.
(Copyright © 2021 Thalita Miranda Vieira et al.)
Databáze: MEDLINE
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