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- W2137198220 abstract "Pereira ESJ, Peixoto IFC, Viana ACD, Oliveira II, Gonzalez BM, Buono VTL, Bahia MGA. Physical and mechanical properties of a thermomechanically treated NiTi wire used in the manufacture of rotary endodontic instruments. International Endodontic Journal, 45, 469–474, 2012. Abstract 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 according to the manufacturer. Chemical composition was determined by energy-dispersive X-ray spectroscopy, phase constitution by XRD and the transformation temperatures by DSC. Tensile loading/unloading tests and Vickers microhardness measurements were performed to assess the mechanical behaviour. Data were analysed using analysis of variance (α = 0.05). Results The two wires showed approximately the same chemical composition, close to the 1 : 1 atomic ratio, and the β-phase was the predominant phase present. B19′ martensite and the R-phase were found in MW, in agreement with the higher transformation temperatures found in this wire compared with CW, whose transformation temperatures were below room temperature. Average Vickers microhardness values were similar for MW and CW (P = 0.91). The stress at the transformation plateau in the tensile load–unload curves was lower and more uniform in the M-Wire, which also showed the smallest stress hysteresis and apparent elastic modulus. Conclusions The M-Wire had physical and mechanical properties that can render endodontic instruments more flexible and fatigue resistant than those made with conventionally processed NiTi wires." @default.
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- W2137198220 date "2011-12-22" @default.
- W2137198220 modified "2023-10-06" @default.
- W2137198220 title "Physical and mechanical properties of a thermomechanically treated NiTi wire used in the manufacture of rotary endodontic instruments" @default.
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- W2137198220 doi "https://doi.org/10.1111/j.1365-2591.2011.01998.x" @default.
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