Amorphous Silica from Rice Hull Ash as a Filler Material for Dental Composites
Rice hull ash, a waste product of rice industry, has a high silica content. In this study we used rice hull ash as a raw material for amorphous silica production. Produced amorphous silica was evaluated as a filler material for dental composites together with hydroxyapatite and, Bis-GMA and HEMA as being the organic matrix. Also commercial silica was used to prepare composites together with hydroxyapatite for comparison. Prepared composites were immersed in artificial saliva to investigate its effect on their hardness and surface properties. SEM observation, FT-IR spectra and Vickers hardness measurements were obtained before and after the incubation in artificial saliva. The results showed that amorphous silica produced from rice hull ash can be used as a low cost alternative filler material for potential dental applications.
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Document Type: Research Article
Publication date: December 1, 2013
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