The purpose of this study was to compare fracture resistances of K3 nickel-titanium files made from different thermal treatments. K3 (SybronEndo, Orange, CA), K3XF (SybronEndo), and experimentally heat treated K3 (K3H) were used. For the cyclic fatigue test, the samples were rotated with up-and-down motion in the artificial canal with the curvature of 60 degrees until the fracture occurred. Current strategies in metallurgical advances of rotary Nov 10, 2017 · removed, the alloy reverts back to its initial austenite form. This stress-induced martensitic transformation is a unique property of NiTi alloys and makes this material one of the few alloys suitable for use in rotary endodontic instruments.5 Strategies in the alteration of NiTi alloy In recent years, new forms of NiTi have been developed by
The aim of this study was to evaluate the impact of body temperature on the cyclic fatigue resistance of different NiTi alloys used for the manufacturing of Reciproc Blue R25 (RB 25.08; VDW, Munich, Germany), X1 Blue File 25 (X1 25.06; MK Life Medical and Dental Products, Porto Alegre, Brazil) and WaveOne Gold Primary (WOG 25.07; Dentsply Maillefer, Ballaigues, Switzerland). Effects of different thermomechanical treatments on The thermomechanically treated as compared to the fully recrystallized NiTi alloys were subjected to thermal, mechanical and thermomechanical fatigue tests. Their microstructural origin was interpreted by TEM investigations. In conclusion it is proposed that a low ratio of pseudo-yield stress to true yield stress is responsible for good Embedded NiTi Wires for Improved Dynamic Nov 11, 2020 · New thermomechanically treated NiTi alloys - a review. Zupanc J, Vahdat-Pajouh N, Schäfer E. Int Endod J, 51(10):1088-1103, 19 Apr 2018 Cited by:11 articles PMID:29574784. Review. Funding . Funders who supported this work. Regio 13 (1)
Feb 17, 2016 · Since 2007, several new thermomechanical processing and manufacturing technologies have been developed in order to optimize the microstructure of NiTi alloys. Recently, several new thermomechanically processed endodontic NiTi files such as the HyFlex CM, K3XF, ProFile GT Series X, Vortex Blue and Twisted Files have been introduced. 26. Mechanical Tests, Metallurgical Characterization, and Oct 01, 2020 · The innovative thermomechanically treated NiTi alloy and the EDM treatment of HyFlex EDM and NeoNiti associated with the largest dimensions of the ProTaper F2 instrument might explain this finding. Similar results were also observed by Kaval et al 27 , who reported superior cyclic fatigue resistance of HyFlex EDM compared with ProTaper Mechanical and Metallurgical Properties of Various Nickel The cyclic fatigue resistance of the thermomechanically treated NiTi instruments was higher. DSC plots revealed that NiTi instruments made with the conventional alloy were primarily composed of austenite at room temperature; stable martensite and R-phase were found in thermomechanically treated instruments. PMCID:PMC5727669 PMID:29318149
NiTi alloys, heat-treated or otherwise, with both superelastic (SE) and shape-memory (SME) properties, using rotational or reciprocating kinetics, centric or eccentric motion (Table). This paper aims to present a review of automated NiTi endodontic instruments, their mechanical properties, and the particular Physical and Mechanical Properties of a Thermomechanically Aim:To compare physical and mechanical properties of one conventional and one thermomechanically treated nickel-titanium (NiTi) wire used to manufacture rotary endodontic instruments. Methodology:Two NiTi wires 1.0 mm in diameter were characterized; one of them, C-wire (CW), was processed in the conventional manner, and the other, termed M-Wire (MW), received an additional heat treatment Study of fatigue behaviour of 7475 aluminium alloy Fatigue properties of a thermomechanically treated 7475 aluminium alloy have been studied in the present investigation. The alloy exhibited superior fatigue life compared to conventional structural aluminium alloys and comparable stage II crack growth rate. It was also noticed that the fatigue crack initiated from a surface grain and the crack extension was dominated by ductile striations.
ARTÍCULOS DE OBLIGADA LECTURA. Primer parcial:. 1) Krasner P, Rankow HJ. Anatomy of the pulp-chamber floor.J Endod. 2004;30:5-16.. https://ncbi.nlm.nih.gov New thermomechanically treated NiTi alloys - a review Apr 19, 2018 · Thermomechanically treated NiTi alloys have been reported to be more flexible with improved cyclic fatigue resistance and greater angle of deflection at failure when compared to conventional NiTi. These enhanced properties may be attributed to a modified phase composition containing varying amounts of R-phase and martensite.