Effect of Zn addition on sol-gel derived apatite/wollastonite glass-ceramics scaffolds
บทคัดย่อ
Bioactive glasses and glass-ceramics consisting of CaO-MgO-P2O5-SiO2 system have been shown tobe bioactive, resorbable and to exhibit appropriate mechanical properties for bone tissue engineeringapplications. Bioactive glass-ceramics scaffolds consisting of zinc doped-apatite/wollastonite (AW) glassceramicswere prepared by coating polyurethane foams with sol-gel derived glass gels. Density andcompressive strength of the scaffolds decreased with increased in zinc contents. In vitro bioactivity of ZndopedAW glass-ceramics in a simulated body fluid (SBF) showed the formation of apatite layer on thesurface within 7 days of soaking. However, increasing Zn addition increased the chemical durability of theAW glass-ceramics, resulting in a decrease in the rate of apatite formation in a simulated body fluid. Withobservation by SEM technique microstructure of pores showed interconnected macropores in the range of 300-500 ?m as depended on the type of sponge. Average pore size increased with increasing the zincadditions. Macropores and interconnect size can be tailored by controlling the zinc concentrations.##plugins.generic.usageStats.downloads##
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2012-12-23
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[1]
S. Tubsungneon Rattanachan, N. Srakaew, R. Pethnin, และ N. Suppakarn, “Effect of Zn addition on sol-gel derived apatite/wollastonite glass-ceramics scaffolds”, J Met Mater Miner, ปี 22, ฉบับที่ 2, ธ.ค. 2012.
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