摘要
目的:测定所制备58S生物医用玻璃陶瓷的机械性能和生物活性。方法:采用溶胶-凝胶法制备单相58S玻璃A组,以超长β-SiC纳米线为增韧体,根据所混合SiC纳米线的质量分数15%、25%、30%和40%制备复合生物玻璃陶瓷B、C、D、E组(每组5个试件),烧结后均加工成标准试件。测定三点弯曲强度及断裂韧性;扫描电子显微镜观察基体断口形貌。结果:随超长β-SiC纳米线质量分数的增加,58S生物玻璃陶瓷基体的抗弯强度先上升后下降,而断裂韧性随β-SiC纳米线质量分数的增多呈线性增加。统计分析结果表明,各组两两间三点弯曲强度和断裂韧性的差异均有统计学意义(P<0.05)。复合生物玻璃陶瓷在SBF中的XRD衍射结果表明仍有羟基磷灰石的成核和生长。结论:新方法合成的58S活性生物医用玻璃陶瓷可兼备优良的机械性能与生物活性。
Objective： To evaluate the mechanical and bioactivity properties of 58s bioactive glass -ceramics. Methods： 58s bioactive glass group A was made by sol -gel method. Bioactive glass -ceramics matrix composites with different β-- SiC nanowires contents（ 15% , 25% , 30% and 40% ） were set as groups B, C, D, E （five specimen for each group） , and then sintered to make standard specimens. The flexural strength and fracture toughness of these specimens were evalua- ted, and the fractography was characterized by scanning electronic microscope（SEM）. Results： It was found that the flex- ural strength of 58s bioactive glass - ceramics matrix composites increased with β-- SiC nanowires content up to 30% , and decreased thereafter. At the same time the fracture toughness showed the linear increase. According to the statistical analy- sis, the flexural strength and fracture toughness between each two group had statistical meaning （ P 〈0.05）. Also, the ma- trix composites in the SBF tests showed the grown and formation of HAP with XRD results. Conclusion： 58s bioactive glass -ceramic made by new method has both better mechanical and bioactivity properties.
出处
《口腔医学研究》
CAS
CSCD
北大核心
2009年第3期271-273,共3页
Journal of Oral Science Research
