Mechanical Properties of ProTaper Gold, EdgeTaper Platinum, Flex Gold and Pro-T Rotary Systems

Author(s)

Alcalde, Murilo Priori ^[1] ; Hungaro Duarte, Marco Antonio ^[1] ; Amoroso Silva, Pablo Andres ^[2] ; Souza Calefi, Pedro Henrique ^[1] ; Silva, Emmanuel J. N. L. ^[3] ; Duque, Jussaro Alves ^[1] ; Vivan, Rodrigo Ricci ^[1]

Affiliation

^[1] Univ Sao Paulo, Bauru Fac Dent, Dept Restorat Dent Dent Mat & Endodont, Bauru, SP - Brazil

^[2] Londrina State Univ UEL, Dept Restorat Dent, Londrina, Parana - Brazil

^[3] Grande Rio Univ Unigranrio, Sch Dent, Dept Endodont, Rio De Janeiro - Brazil

• Document type: Journal article
• Source: EUROPEAN ENDODONTIC JOURNAL; v. 5, n. 3, p. 205-211, 2020.
• Web of Science Citations: 0

Abstract

Objective: The aim of this study was to evaluate the cyclic fatigue, torsional behavior and bending resistance of EdgeTaper Platinum {[}ETP (tip 25, taper 0.06)], Flex Gold {[}FG (tip 25, taper 0.08)], Pro-T {[}PT (tip 25, taper 0.08)] and ProTaper Gold {[}PTG (tip 25, taper 0.08)] systems. Methods: Rotary instruments of ETP, PT, FG, and PTG were used (n=30). Cyclic fatigue tests were performed using an artificial stainless-steel canal with a 60 degrees angle and a 5-mm radius of curvature at body temperature (35 degrees +/- 1 degrees C). The time and number of cycles to fracture (NCF) was recorded. The torsional test evaluated the torque and angle of rotation to failure at 3 mm from the tip according to ISO 3630-1. The fractured surface of each fragment was observed by using scanning electron microscopy (SEM). The bending test evaluated the torque required to bend the instruments at an angular deflection of 60 degrees. Data were analyzed using one-way ANOVA and Tukey tests, and the level of significance was set at 5%. Results: The ETP had highest time until fracture and NCF than all the groups (P<0.05). The PTG had the highest torsional strength, followed by FG (P<0.05). The ETP had the highest angular rotation, followed by PT and PTG (P<0.05). The FG showed the highest bending resistance, followed by the PTG (P<0.05). Conclusion: In conclusion, the ETP and PT exhibited higher cyclic fatigue resistance, higher angular deflection values and lower bending force than FG and PTG. The PTG instruments showed the highest torsional strength and the lowest cyclic fatigue resistance. (AU)

• FAPESP's process: 14/25520-0 - 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
• Grantee: Rodrigo Ricci Vivan
• Support Opportunities: Regular Research Grants