In vitro bioactivity of glass–ceramics of the CaMgSi2O6–CaSiO3–Ca5(PO4)3F–Na2SiO3 system with TiO2 or ZnO additives

• Published in: Ceramics international Vol. 35; no. 3; pp. 1083 - 1093
• Main Authors: Salman, S.M., Salama, S.N., Darwish, H., Abo-Mosallam, H.A.
• Format: Journal Article
• Language: English
• Published: 01.04.2009
• ISSN: 0272-8842
• DOI: 10.1016/j.ceramint.2008.04.025

Glass-ceramic materials based on diopside [CaMgSi2O6]-wollastonite [CaSiO3]-fluorapatite [Ca5(PO4)3F]-sodium silicate [Na2SiO3] system with TiO2 or ZnO additives were prepared and examined in vitro, using a simulated body fluid (SBF) solution, for their viability as restorative dental and bone implant materials. In-vitro bioactivity of the glass-ceramics was examined by EDAX-SEM and ICP. The addition of TiO2 had a positive effect on the bioactivity behaviour of the crystallised sample, while introducing ZnO to the glass led to a decrease in apatite formation on the corresponding glass-ceramic sample. In-vitro tests of glass-ceramics containing sodium calcium silicate solid solution showed higher bioactivity than those containing fluorapatite. This indicated that the sodium calcium silicate solid solution has a higher bioactive index than fluorapatite. The coefficients of thermal expansion of the obtained glass-ceramic materials were between 97 x 10 exp(-7)/K and 127 x 10 exp(-7)/K in the 25-600 C temperature range and the Vickers microhardness values were between 4635 and 6615 MPa.