Induction of bioactivity of a non-bioactive glass-ceramic by a chemical treatment

Biomaterials
S B ChoT Nakamura

Abstract

Glass-ceramic A-W(Al), which was prepared by heat treatment of a MgO-CaO-SiO2-P2O5-Al2O3 glass to precipitate crystalline apatite and wollastonite, shows a higher mechanical strength than glass-ceramic A-W, which was prepared by heat treatment of a MgO-CaO-SiO2-P2O5 glass to precipitate the same types of crystalline phases. The former, however, does not show bone-bonding ability, i.e. bioactivity, whereas the latter shows it. In the present study, in order to induce bioactivity of glass-ceramic A-W(Al), it was treated with HCl or NaOH solutions with different concentrations, and its bioactivity was evaluated by examining the apatite formation on its surface in a simulated body fluid (SBF) with ion concentrations nearly equal to those of human blood plasma. When the glass-ceramic A-W(Al) was pretreated with HCl aqueous solutions with concentrations over 0.1 M, it formed the bone-like apatite on its surface in SBF. This was attributed to the formation of a hydrated silica on its surface by the HCl treatment.

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Citations

Mar 7, 2008·Journal of Materials Science. Materials in Medicine·Ariadne Cristiane Cabral da CruzFábio André Santos
May 24, 2005·Journal of Biomedical Materials Research. Part a·Hailong ZhangRoger St C Smart
Apr 7, 2007·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Xia LiJianhua Gao
Dec 10, 2013·Journal of the Mechanical Behavior of Biomedical Materials·F S ShiraziN A Abu Osman
Mar 8, 2011·Journal of Colloid and Interface Science·Yong FanJun Lin
Dec 25, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiaojiao KangJun Lin

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