Dependence of Apatite Formation on Silica Gel on Its Structure: Effect of Heat Treatment

DOI Web Site Web Site 被引用文献75件

抄録

<jats:p> <jats:bold>The prerequisite for glasses and glass‐ceramics to bond to living bone is the formation of biologically active bonelike apatite on their surfaces in the body. Our previous study showed that a silica gel prepared by hydrolysis and polycon‐ densation of tetraethoxysilane in aqueous solution containing poly(ethy1ene glycol) induces apatite nucleation on its surface in a simulated body fluid. In the present study, the effects of heat treatment of silica gel on its catalytic effects in apatite nucleation was investigated in a simulated body fluid. I t was found that apatite forms on the surfaces of silica gels heat‐treated below 8OO°C, but not on those heat‐treated above 900°C. The volume of nanometer‐range pores in the gel remarkably decreased by heat treatment above 900°C. The concentration of silanol groups in the silica gels gradually decreased with increasing heat treatment temperature. The rate of silica dissolution from the gel into the simulated body fluid decreased remarkably by heat treatment above 900°C. This suggested that a special type of silanol group which is formed by soaking the gel treated below 800°C into the simulated body fluid is respon sible for apatite nucleation.</jats:bold> </jats:p>

収録刊行物

被引用文献 (75)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ