铸造钴铬合金含银抗菌涂层表面特性及抗菌性能研究

The surface structure and antibacterial property of Ag-containing coating on casting cobalt chromium alloy

目的:观察钴铬合金含银抗菌涂层的表面特征和抗菌性能。方法:利用真空等离子喷涂方式在铸造钴铬合金表面制备含银抗菌涂层,通过扫描电镜、能谱分析和X射线衍射分析涂层的表面性能。以常规铸造的钴铬合金试件作为对照组,含银抗菌涂层铸造钴铬合金为实验组,选用贴膜法和荧光显微镜分析法比较2组试件对变形链球菌和白色念珠菌的抗菌性能和抗黏附性能。结果:涂层表面结构均匀致密,与基底材料间未见明显间隙,表层主要物相为Ag、Cr和少量Ag2O、Cr2O3。抗菌结果显示,实验组2种菌的菌落数明显少于对照组菌落数(P<0.05),细菌黏附性明显低于对照组。结论:涂银钴铬合金涂层性能稳定,具有较好的抗菌性能和抗黏附性能。

Objective：To study the surface structure and antibacterial property of Ag-containing coating（AgCC）on casting cobalt chromium alloy（Co-Cr）.Methods：Plasma spraying technique was adopted to prepare AgCC on Co-Cr.Scanning electron microsco-py,energy dispersive analysis and X-ray diffraction analysis were used to evaluate the surface properties.The antibacterial effects of AgCC against staphylococcus aureus and candida albicans were examined by film attachment method.Fluorescence microscope was a-dopted to evaluate the bacteria adhesion property.Results：AgCC surface was uniform and compact,combined perfectly with sub-strate material.The content of the surface was mainly Ag,Cr and a small amount of Ag2 O and Cr2 O3 .The results of antibacterial as-say showed that on AgCC the number of bacterial colony was fewer（P〈0.05）and bacterial adhesion was less than those on Co-Cr（P〈0.05）.Conclusion：AgCC surface was stable and has antibacterial property.