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Structure of bioactive glass and its application to glass ionomer cement.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Matsuya, Shigeki Matsuya, Yoko Ohta, Michio |
| Copyright Year | 1999 |
| Abstract | We prepared a new glass ionomer cement using bioactive CaO-P2O5-SiO2(-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, SiO2:34.2 and P2O5:16.3% in weight. FT-IR analysis showed that the COOH group in the polyacrylic acid decreased and carboxylate ion (COO-Ca2+) increased after the setting reaction. A broad signal appeared around -82 ppm in 29Si 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 Ca2+ 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. |
| Starting Page | 490 |
| Ending Page | 491 |
| Page Count | 2 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/dmj1982/18/2/18_2_155/_pdf |
| PubMed reference number | 10786128v1 |
| Volume Number | 18 |
| Issue Number | 2 |
| Journal | Dental materials journal |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | 3-Mercaptopropionic Acid Calcium ion Carbomer-940 Compressive Strength Dental Cement Material Glass Ionomer Cements Ions Silica Gel Silicates Silicic Acid Silicon Dioxide carboxyl radical carboxylate part per million (ppm) |
| Content Type | Text |
| Resource Type | Article |
