无机材料学报

• 研究论文 • 上一篇    下一篇

多孔硅酸钙生物陶瓷的制备及体外活性和降解性研究

林开利; 常江; 汪正   

  1. 中国科学院上海硅酸盐研究所生物材料与组织工程研究中心, 上海 200050
  • 收稿日期:2004-04-16 修回日期:2004-05-19 出版日期:2005-05-20 网络出版日期:2005-05-20

Fabrication and the Characterisation of the Bioactivity and Degradability of Macroporous Calcium Silicate Bioceramics in vitro

LIN Kai-Li; CHANG Jiang; WANG Zheng   

  1. Biomaterials and Tissue Engineering Research Center; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2004-04-16 Revised:2004-05-19 Published:2005-05-20 Online:2005-05-20

摘要: 以聚乙二醇为造孔剂,制备了多孔硅酸钙生物陶瓷.应用本文提供的方法,可制得孔连通性好、气孔率53.7%-73.6%、抗压强度4.9-48.5MPa、大孔孔径200-500μm的多孔陶瓷.研究表明,多孔硅酸钙生物陶瓷的力学强度随造孔剂含量的增加而明显降低,而气孔率则相反.应用模拟体液浸泡实验研究了多孔陶瓷的体外生物活性和降解性.研究表明,样品在模拟体液中浸泡1天表面就全部被碳酸代羟基磷灰石层覆盖住.气孔率为63.1%的样品7天的降解率达7.14%,具有良好的降解性.研究结果显示多孔硅酸钙生物陶瓷有望作为硬组织修复支架材料用.

关键词: 多孔硅酸钙, 生物陶瓷, 生物活性, 降解性

Abstract: Macroporous calcium silicate bioceramics with interconnected pore structures were prepared by adding
PEG as pore-forming agent. The porosity and the compressive strength were controlled between 53.7% and 73.6% and 4.9MPa and 48.5MPa,
respectively, by the regulation of PEG amount. The samples with porosity of 63.1% were soaked in simulated body fluid (SBF) to investigate their
bioactivity and degradability. After soaking in SBF for 1 day, the samples were completely covered by hydroxycarbonate apatite layers. The degradability
of the samples reached 7.14% after soaking in SBF for 7 days. The results suggested excellent in vitro bioactivity and degradability of the macroporous
calcium silicate ceramics. Therefore, these macroporous calcium silicate ceramics may be potential candidates as bioactive and degradable scaffolds
for hard tissue repair and tissue engineering applications.

Key words: macroporous calcium silicate, bioceramics, bioactivity, degradability

中图分类号: