loading page

Cyclic and Torsional Fatigue Resistance of a New Rotary File on a Rotary and Reciprocating Motion.
  • +5
  • Gabriel Barcelos Só,
  • Giovana Siocheta,
  • Pedro Calefi,
  • Murilo Alcalde,
  • Rodrigo Vivan,
  • Marco Antonio Duarte,
  • Marcus Vinícius Só,
  • ricardo rosa
Gabriel Barcelos Só
Universidade Federal do Rio Grande do Sul Faculdade de Odontologia
Author Profile
Giovana Siocheta
Universidade Federal do Rio Grande do Sul Faculdade de Odontologia
Author Profile
Pedro Calefi
Universidade de Sao Paulo Faculdade de Odontologia de Bauru
Author Profile
Murilo Alcalde
Universidade de Sao Paulo Faculdade de Odontologia de Bauru
Author Profile
Rodrigo Vivan
Universidade de Sao Paulo Faculdade de Odontologia de Bauru
Author Profile
Marco Antonio Duarte
Universidade de Sao Paulo Faculdade de Odontologia de Bauru
Author Profile
Marcus Vinícius Só
Universidade Federal do Rio Grande do Sul Faculdade de Odontologia
Author Profile
ricardo rosa
Universidade Federal do Rio Grande do Sul Faculdade de Odontologia

Corresponding Author:[email protected]

Author Profile

Abstract

Introduction: This study aimed to evaluate the cyclic and torsional fatigue resistance of a new nickel-titanium (Flat File 25.04) instrument on continuous and reciprocating motion. Methods: Sixty instruments of the ProDesign Logic2 25.03 and 25.05 (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), and MK Flat File 25.04 (n=20) (MK Life, Porto Alegre, Brazil) were used. For the cyclic fatigue test, an artificial stainless steel simulated canal with an angle of 60° and a radius of curvature of 5mm located 5mm from its tip was used. Torque and angle of rotation at failure of instruments on torsional fatigue test was based on the ISO 3630-1 protocol, in which the 3mm tip of each instrument was fixed and connected to an electric motor and a load cell. The fractured surface of each fragment was examined by scanning electron microscopy. Data were analyzed using 1-way analysis of variance and Tukey’s test with a significance level of 5%. Results: Flat File 25.04 had lower cyclic fatigue in both kinematics than the Logic instruments (P < .05). Reciprocating motion improved the cyclic fatigue of the tested instruments (P < .05). Flat File 25.04 had similar torque to Logic2 25.05 (P < .05), and both were superior to Logic2 25.03 (P < .05). The angular deflection values were different for the three tested instruments (P < .05), in the decreasing order: Logic2 25.03, 25.05, and Flat File 25.04. Conclusion: Flat File presented acceptable resistance to cyclic and torsional fatigue resistance. Reciprocating motion improved the cyclic fatigue resistance of the instruments and can be considered when using programmable motors.
08 Mar 2023Submitted to Microscopy Research and Technique
10 Mar 2023Submission Checks Completed
10 Mar 2023Assigned to Editor
11 Mar 2023Review(s) Completed, Editorial Evaluation Pending
26 Mar 2023Reviewer(s) Assigned
06 Apr 2023Editorial Decision: Revise Minor
26 Apr 20231st Revision Received
26 Apr 2023Submission Checks Completed
26 Apr 2023Assigned to Editor
26 Apr 2023Review(s) Completed, Editorial Evaluation Pending
29 Apr 2023Reviewer(s) Assigned
08 Jun 2023Editorial Decision: Revise Major
19 Jun 20232nd Revision Received
19 Jun 2023Submission Checks Completed
19 Jun 2023Assigned to Editor
19 Jun 2023Review(s) Completed, Editorial Evaluation Pending
24 Jun 2023Reviewer(s) Assigned
06 Aug 2023Editorial Decision: Accept