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Effect of Ion Release on Antibacterial Activity of Melt-Derived and Sol-Gel-Derived Reactive Ceramics

机译:离子释放对熔体衍生和溶胶凝胶衍生活性陶瓷抗菌活性的影响

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摘要

Four different bioreactive ceramics were prepared using a sol-gel method and a standard melting process. The aim was to study antibacterial effect of these materials on the growth of Staphylococcus epidermidis. The dissolution (Si and Ca ions) of fine ( ≤ 45 μm) ceramic powders in a tryptone soya broth (TSB) was investigated. Also the pH changes in TSB solution were measured. In addition the adherence of Enterococcus faecalis (Ef) to materials was investigated. The bacterial adhesion was studied using scanning electron microscopy (SEM). In the bacterial and the adhesion test, CaPSiO_2 and S53P4 had the strongest antimicrobial effect against studied bacteria. It was shown that bioreactive sol-gel derived ceramic with sufficient high Ca ion release ( > 270 ppm) can reach strong antibacterial effect also at lower pH values ( < 9.6).
机译:使用溶胶-凝胶法和标准熔融工艺制备了四种不同的生物反应性陶瓷。目的是研究这些材料对表皮葡萄球菌生长的抗菌作用。研究了细粉(≤45μm)陶瓷粉末在胰蛋白so大豆肉汤(TSB)中的溶解(Si和Ca离子)。还测量了TSB溶液中的pH变化。另外,还研究了粪肠球菌(Ef)对材料的粘附性。使用扫描电子显微镜(SEM)研究细菌粘附。在细菌和附着力测试中,CaPSiO_2和S53P4对研究的细菌具有最强的抗菌作用。结果表明,具有足够高的Ca离子释放量(> 270 ppm)的生物反应性溶胶-凝胶衍生的陶瓷在较低的pH值(<9.6)时也可以达到强大的抗菌作用。

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