Abstract
Mineral trioxide aggregate (MTA) cement is an attractive material in endodontic dentistry. The purpose of this study was to produce calcium silicate, which is a major component of MTA, from waste materials. A dental alginate impression gel and used chalks were selected and mixed in a suitable ratio (Code: EXP). As a control, CaCO3 and a commercial diatomite were used (Code: CON). Each powder was heated to 850。C and 1000。C, and then kneaded with water. TG-DTA, compressive tests, SEM observations, elemental mapping analyses, and XRD analyses were performed. TG-DTA indicated that weight reduction of CaCO3 started at 600。C, and it completely decomposed on heating at 850。C. The strength was affected by the temperature. After heating, CaCO3 was transformed into CaO and/or Ca2SiO4, and Ca(OH)2 was formed by mixing with water. There were no differences between EXP and CON. These data suggested that recycled wastes might be promising MTA sources.
Highlights
Most used materials generally become wastes, and dental materials such as waxes, impression materials, gyp-How to cite this paper: Yamaguchi, N., Masuda, Y., Yamada, Y., Narusawa, H., Han-Cheol, C., Tamaki, Y. and Miyazaki, T. (2015) Synthesis of CaO-SiO2 Compounds Using Materials Extracted from Industrial Wastes
Mineral trioxide aggregate (MTA) cement is an attractive material in endodontic dentistry, especially for teeth with severe and/or long-term root canal treatment [7]-[10]
To synthesize Ca2SiO4, which is one of the major components of MTA [7]-[9], we initially explored possible ways of supplying both SiO2 and CaO
Summary
Most used materials generally become wastes, and dental materials such as waxes, impression materials, gyp-How to cite this paper: Yamaguchi, N., Masuda, Y., Yamada, Y., Narusawa, H., Han-Cheol, C., Tamaki, Y. and Miyazaki, T. (2015) Synthesis of CaO-SiO2 Compounds Using Materials Extracted from Industrial Wastes. (2015) Synthesis of CaO-SiO2 Compounds Using Materials Extracted from Industrial Wastes. Open Journal of Inorganic Non-Metallic Materials, 5, 1-10. Inorganic substances such as oxides, nitrides, hydroxides, and sulfides are valuable resources. Some oxide materials have been shown to be promising for metal-free restoration because they have sufficient strength, no flammability, high stiffness, a natural tooth-color, and excellent bio-inertness [4]-[6]. Such materials are used in clinical restoration as composites with monomers. Because of the aesthetic outcome and their safety for use in humans, these ceramics are valuable in dentistry
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