Evaluation of chemical properties, torsional and flexural resistance, geometric and superficial characterization of endodontic instruments depending on the alloy treatment: analysis after 3 times simulating clinical use

• Grant number: 14/25520-0
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2015
• End date: July 31, 2017
• Field of knowledge: Health Sciences - Dentistry - Endodontics
• Principal Investigator: Rodrigo Ricci Vivan
• Grantee: Rodrigo Ricci Vivan
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Associated researchers: Clovis Monteiro Bramante ; Marco Antonio Hungaro Duarte

Abstract

The aim this research is to evaluate the chemical properties, torsional and flexural resistance, geometric and superficial characterization of different instruments depending on the treatment of the league, after 3 times simulating clinical use. 120 instruments will be used, divided into 4 groups (n=30). Group 1 (M-Wire): 30 instruments R25 (25.08) system Reciproc (VDW, Munich, Germany); Group 2 (R Phase): 30 TF Adaptive instruments 25.08 (SybronEndo, Orange, CA); Group 3 (CM): 30 instruments Hyflex CM 25.08 (Coltene Whaledent-, Altsteatten, Switzerland); Group 4 (conventional): 30 instruments Medin (25.06) (Medin, Czech Republic). Chemical properties analysis will be performed by means of Spectroscopy x-ray energy (EDS). Torsion tests shall be carried out in a twisting machine for bench tests according to the specification n° 28 of the LONG-AWAITED. Geometric characterization and dimensional stability of the instruments will be held by means of measures of length of the active part, diameter of the instrument every millimeter of the active part, distance between the cutting blades (pitches) and tip angle, using the Image-Pro Plus 6.0 software (Media Cybernetics, Silver Spring, MD, USA). The superficial characterization and surface analysis of fractured instruments will be analyzed by means of scanning electron microscopy (SEM). The flexion tests shall be carried out in a conter top device, which allow free rotation of the instruments in a artificial curved Canal, simulating the geometric boundary condition of instrumentation in clinical practice, considering only the efforts of flexion in the region of maximum curvature. The phases present in the instruments will be analyzed by x-ray diffractometry of x-rays (EDX). The results will be submitted to the tests of D'agostino and Pearson for verification of normal distribution. In case of absence of normality, will be employed non-parametric test of Kruskal-Wallis. Having normality will be employed the parametric test of ANOVA. For all tests will be considered the significance level of 5%. (AU)

Scientific publications

(8)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CAMARGO, E. J.; DUARTE, M. A. H.; MARQUES, V. A. S.; SO, M. V. R.; DUQUE, J. A.; ALCALDE, M. P.; VIVAN, R. R.. The ability of three nickel-titanium mechanized systems to negotiate and shape MB2 canals in extracted maxillary first molars: a micro-computed tomographic study. International Endodontic Journal, v. 52, n. 6, p. 847-856, JUN 2019. (14/25520-0)

KLYMUS, MICHEL ESPINOSA; ALCALDE, MURILO PRIORI; VIVAN, RODRIGO RICCI; REIS SO, MARCUS VINICIUS; DE VASCONSELOS, BRUNO CARVALHO; HUNGARO DUARTE, MARCO ANTONIO. Effect of temperature on the cyclic fatigue resistance of thermally treated reciprocating instruments. CLINICAL ORAL INVESTIGATIONS, v. 23, n. 7, p. 3047-3052, JUL 2019. (14/25520-0)

ALCALDE, MURILO PRIORI; HUNGARO DUARTE, MARCO ANTONIO; AMOROSO SILVA, PABLO ANDRES; SOUZA CALEFI, PEDRO HENRIQUE; SILVA, EMMANUEL J. N. L.; DUQUE, JUSSARO ALVES; VIVAN, RODRIGO RICCI. Mechanical Properties of ProTaper Gold, EdgeTaper Platinum, Flex Gold and Pro-T Rotary Systems. EUROPEAN ENDODONTIC JOURNAL, v. 5, n. 3, p. 205-211, 2020. (14/25520-0)

WEISSHEIMER, THEODORO; DUARTE, MARCO ANTONIO HUNGARO; SO, MARCUS VINICIUS REIS; DA ROSA, RICARDO ABREU; ESPINOSA, MICHEL KLYMUS; VIVAN, RODRIGO RICCI; ALCALDE, MURILO PRIORI. Evaluation of cyclic and torsional fatigue resistance of several heat-treated reciprocating nickel-titanium instruments. AUSTRALIAN ENDODONTIC JOURNAL, v. N/A, p. 6-pg., 2023-07-13. (14/25520-0)

DUARTE, PEDRO MARKS; DA SILVA, PAULA BARCELLOS; ALCALDE, MURILO PRIORI; VIVAN, RODRIGO RICCI; DA ROSA, RICARDO ABREU; HUNGARO DUARTE, MARCO ANTONIO; REIS SO, MARCUS VINICIUS. Canal Transportation, Centering Ability, and Cyclic Fatigue Promoted by Twisted File Adaptive and Navigator EVO Instruments at Different Motions. JOURNAL OF ENDODONTICS, v. 44, n. 9, p. 1425-1429, SEP 2018. (14/25520-0)

ALCALDE, MURILO PRIORI; HUNGARO DUARTE, MARCO ANTONIO; BRAMANTE, CLOVIS MONTEIRO; DE VASCONSELOS, BRUNO CARVALHO; TANOMARU-FILHO, MARIO; GUERREIRO-TANOMARU, JULIANE MARIA; PINTO, JADER CAMILO; REIS SO, MARCUS VINICIUS; VIVAN, RODRIGO RICCI. Cyclic fatigue and torsional strength of three different thermally treated reciprocating nickel-titanium instruments. CLINICAL ORAL INVESTIGATIONS, v. 22, n. 4, p. 1865-1871, MAY 2018. (14/25520-0)

ALCALDE, MURILO P.; TANOMARU-FILHO, MARIO; BRAMANTE, CLOVIS M.; DUARTE, MARCO ANTONIO H.; GUERREIRO-TANOMARU, JULIANE MARIA; CAMILO-PINTO, JADER; REIS SO, MARCUS VINICIUS; VIVAN, RODRIGO RICCI. Cyclic and Torsional Fatigue Resistance of Reciprocating Single Files Manufactured by Different Nickel-titanium Alloys. JOURNAL OF ENDODONTICS, v. 43, n. 7, p. 1186-1191, JUL 2017. (14/25520-0)

ALCALDE, M. P.; DUARTE, M. A. H.; BRAMANTE, C. M.; TANOMARU-FILHO, M.; VASCONCELOS, B. C.; SO, M. V. R.; VIVAN, R. R.. Torsional fatigue resistance of pathfinding instruments manufactured from several nickel-titanium alloys. International Endodontic Journal, v. 51, n. 6, p. 697-704, JUN 2018. (14/25520-0)