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Silver deposition on titanium surface by electrochemical anodizing process reduces bacterial adhesion ofStreptococcus sanguinisandLactobacillus salivarius

机译:通过电化学阳极氧化过程对钛表面上的银沉积可减少血吸虫的细菌粘附性Salivarius

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摘要

ObjectivesThe aim of this study was to determine the antibacterial properties of silver-doped titanium surfaces prepared with a novel electrochemical anodizing process.; Material and methodsTitanium samples were anodized with a pulsed process in a solution of silver nitrate and sodium thiosulphate at room temperature with stirring. Samples were processed with different electrolyte concentrations and treatment cycles to improve silver deposition. Physicochemical properties were determined by X-ray photoelectron spectroscopy, contact angle measurements, white-light interferometry, and scanning electron microscopy. Cellular cytotoxicity in human fibroblasts was studied with lactate dehydrogenase assays. The in vitro effect of treated surfaces on two oral bacteria strains (Streptococcus sanguinis and Lactobacillus salivarius) was studied with viable bacterial adhesion measurements and growth curve assays. Nonparametric statistical Kruskal-Wallis and Mann-Whitney U-tests were used for multiple and paired comparisons, respectively. Post hoc Spearman's correlation tests were calculated to check the dependence between bacteria adhesion and surface properties.; ResultsX-ray photoelectron spectroscopy results confirmed the presence of silver on treated samples and showed that treatments with higher silver nitrate concentration and more cycles increased the silver deposition on titanium surface. No negative effects in fibroblast cell viability were detected and a significant reduction on bacterial adhesion in vitro was achieved in silver-treated samples compared with control titanium.; ConclusionsSilver deposition on titanium with a novel electrochemical anodizing process produced surfaces with significant antibacterial properties in vitro without negative effects on cell viability.
机译:本研究的客观目的是确定用新型电化学阳极氧化过程制备的银掺杂钛表面的抗菌性质。用搅拌在室温下在硝酸银和硫代硫酸钠的溶液中阳极氧化材料和方法样品。用不同的电解质浓度和处理循环处理样品以改善银沉积。物理化学特性由X射线光电子能谱,接触角测量,白光干涉测量和扫描电子显微镜测定。用乳酸脱氢酶测定研究人成纤维细胞中的细胞细胞毒性。研究了处理表面对两个口腔细菌菌株(链球菌和乳杆菌唾液)的体外效果,采用活细菌粘附测量和生长曲线测定。非参数统计Kruskal-Wallis和Mann-Whitney U-Tests分别用于多个和配对比较。 Hoc Spearman的相关性测试是计算检查细菌粘附和表面性质之间的依赖性。结果肟光电子能谱结果证实了在处理过的样品上存在银,并显示硝酸银银浓度较高等循环的处理增加了钛表面上的银沉积。除了对照钛相比,在银处理的样品中,检测到成纤维细胞活力中没有对成纤维细胞活力的负面影响,与对照钛相比,在银处理样品中实现了显着降低。结论用新型电化学阳极氧化工艺对钛的沉积沉积,在体外产生具有显着抗菌性能的表面,没有对细胞活力的负面影响。

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