Article
Physicochemical parameters - hydration performance relationship of the new endodontic cement MTA Repair HP
Author/s | Jiménez Sánchez, María del Carmen
Segura Egea, Juan José Díaz Cuenca, Aranzazu |
Department | Universidad de Sevilla. Departamento de Estomatología |
Publication Date | 2019-06-04 |
Deposit Date | 2024-09-11 |
Published in |
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Abstract | Background: To characterize the chemical composition and textural parameters of the MTA Repair HP precursor
powder and their influence to hydration performance.
Material and Methods: Un-hydrated precursor material was ... Background: To characterize the chemical composition and textural parameters of the MTA Repair HP precursor powder and their influence to hydration performance. Material and Methods: Un-hydrated precursor material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray fluorescence (XRF), laser diffraction (LD), N2 physisorption and field emission gun scanning electron microscopy (FEG-SEM). Setting time was assessed according to ASTM specification C 266. Hydrated material was analysed by XRD, FT-IR, energy dispersive X-ray (EDX) analysis and FEG-SEM. Results: Ca3 SiO5 and Ca2 SiO4 , in addition to CaWO4 as radiopacifier are the main compositional phases. Other measured parameters indicate high specific surface area of 4.8 m2 g-1, high aluminium content of 1.7 wt.% and low initial and final setting times of 12 and 199 min, respectively. Singular microstructural features consisting of high aspect ratio nanoparticles are main constituents of un-hydrated precursor. Besides, FEM-SEM observation shows notably growth of hexagonal shaped plate-like morphologies homogeneously distributed along the sample during hydration process. Conclusions: The short setting time measured for HP Repair, is correlated with high surface area of precursor powder, high Al content and the absence of compositional sulphate phases. |
Citation | Jiménez Sánchez, M.d.C., Segura Egea, J.J. y Díaz Cuenca, A. (2019). Physicochemical parameters - hydration performance relationship of the new endodontic cement MTA Repair HP. Journal of Clinical and Experimental Dentistry, 11 (8), e739-e744. https://doi.org/10.4317/jced.56013. |
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