Structural analysis of HyFlex EDM instruments
| Autor: | Paolo Sassatelli, Luca Lusvarghi, Maria Giovanna Gandolfi, Chiara Pirani, Luigi Generali, Francesco Iacono, Giovanni Bolelli, Carlo Prati, Loris Giorgini |
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| Přispěvatelé: | DIPARTIMENTO DI CHIMICA INDUSTRIALE 'TOSO MONTANARI', DIPARTIMENTO DI SCIENZE BIOMEDICHE E NEUROMOTORIE, Facolta' di MEDICINA e CHIRURGIA, Da definire, AREA MIN. 06 - Scienze mediche, AREA MIN. 03 - Scienze chimiche, F. Iacono, C. Pirani, L. Generali, G. Bolelli, P. Sassatelli, L. Lusvarghi, M. G. Gandolfi, L. Giorgini, C. Prati |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Dental Instruments
NiTi endodontic instrument Surface Properties microstructure Young's modulus 02 engineering and technology CM wire Differential scanning calorimetry Electro-discharge machining Metallurgical properties Microstructure NiTi endodontic instruments Dentistry (all) electro-discharge machining 03 medical and health sciences symbols.namesake 0302 clinical medicine Electrical discharge machining Machining X-Ray Diffraction Hardness Nickel Materials Testing Composite material General Dentistry Austenite Titanium Calorimetry Differential Scanning metallurgical properties 030206 dentistry 021001 nanoscience & nanotechnology Elasticity Martensite symbols differential scanning calorimetry 0210 nano-technology Raman spectroscopy metallurgical propertie Biomedical engineering Dental Alloys |
| Popis: | none 9 no Aim: To compare the phase transformation behaviour, the microstructure, the nano-hardness and the surface chemistry of electro-discharge machined HyFlex EDM instruments with conventionally manufactured HyFlex CM. Methodology: New and laboratory used HyFlex EDM were examined by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Nano-hardness and modulus of elasticity were also investigated using a maximum load of 20 mN with a minimum of 40 significant indentations for each sample. Raman spectroscopy and field emission-scanning electron microscope (FE-SEM) were used to assess the surface chemistry of HyFlex EDM. HyFlex CM were subjected to the same investigations and used as a comparison. Nano-indentation data were statistically analysed using the Student's t-test. Results: XRD analysis on HyFlex EDM revealed the presence of martensite and rhombohedral R-phase, while a mixture of martensite and austenite structure was identified in HyFlex CM. DSC analysis also disclosed higher austenite finish (Af) temperatures for electro-discharge machining (EDM) instruments. Significant differences in nano-hardness and modulus of elasticity were found between EDM and CM files (P |
| Databáze: | OpenAIRE |
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