Structure of Bioactive Glass and its Application to Glass Ionomer Cement
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概要
- 論文の詳細を見る
We prepared a new glass ionomer cement using bioactive CaO-P_2O_5-SiO_2(-MgO) glass and investigated its setting process using FT-IR and MAS NMR analyses. The compressive strengths of the cements depended on the glass composition and a maximum strength of 33.3±4.7 MPa was obtained using cement with the glass composition of MgO:4.6, CaO:44.9, SiO_2:34.2 and P_2O_5:16.3% in weight. FT-IR analysis showed that the COOH group in the polyacrylic acid decreased and carboxylate ion (COO^-Ca^<2+>) increased after the setting reaction. A broad signal appeared around -82 ppm in ^<29>Si MAS-NMR spectra of the glass and a new signal corresponding to hydrated silica gel formation appeared around -102 and -111 ppm after setting. This suggests that Ca^<2+> was released from the glass powder to form carboxylate salt and that a degree of polymerization in the silicate network increased. The setting mechanism of the cement was found to be essentially the same as in conventional glass ionomer cement.
- 日本歯科理工学会の論文
著者
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Matsuya Shigeki
Department Of Biomaterials Faculty Of Dental Science Kyushu University
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Ohta M
Department Of Dental Materials Engineering Faculty Of Dentistry Kyushu University
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Matsuya Shigeki
Department Of Dental Materials Engineering Faculty Of Dentistry Kyushu University
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Ohta Michio
Department Of Bacteriology Nagoya University Postgraduate School Of Medicine
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MATSUYA Yoko
Department of Operative Dentistry and Endodontology, Faculty of Dentistry, Kyushu University
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Ohta Michio
Department Of Bacteriology Graduate School Of Medicine Nagoya University
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Matsuya Yoko
Department Of Operative Dentistry And Endodontology Faculty Of Dentistry Kyushu University
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