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Open AccessArticle

Calcium Charge and Release of Conventional Glass-Ionomer Cement Containing Nanoporous Silica

1
Department of Dentistry for Children and Disabled Person, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7, Kita-ku, Sapporo 060-8586, Hokkaido, Japan
2
Department of Biomaterials and Bioengineering, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Hokkaido, Japan
3
Department of Dentistry for Molecular Cell Pharmacology, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Hokkaido, Japan
*
Author to whom correspondence should be addressed.
Materials 2018, 11(8), 1295; https://doi.org/10.3390/ma11081295
Received: 5 July 2018 / Revised: 21 July 2018 / Accepted: 23 July 2018 / Published: 27 July 2018
(This article belongs to the Special Issue Bioactive and Therapeutic Dental Materials)
The aim of this study was to evaluate calcium charge and release of conventional glass-ionomer cement (GIC) containing nanoporous silica (NPS). Experimental specimens were divided into two groups: the control (GIC containing no NPS) and GIC-NPS (GIC containing 10 wt % NPS). The specimens were immersed in calcium chloride solutions of 5 wt % calcium concentration for 24 h at 37 °C, whereupon the calcium ion release of the specimens was measured. The calcium ion release behavior of GIC-NPS after immersion in the calcium solution was significantly greater than that of the control. Scanning electron microscopy and electron-dispersive X-ray spectroscopy results indicated that calcium penetrated inside the GIC-NPS specimen, while the calcium was primarily localized on the surface of the control specimen. It was demonstrated that NPS markedly improved the calcium charge and release property of GIC. View Full-Text
Keywords: nanoporous silica; glass-ionomer cement; calcium nanoporous silica; glass-ionomer cement; calcium
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Nakamura, K.; Abe, S.; Minamikawa, H.; Yawaka, Y. Calcium Charge and Release of Conventional Glass-Ionomer Cement Containing Nanoporous Silica. Materials 2018, 11, 1295.

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