The porous TiO₂ coatings containing Ca/P/Ag were separately prepared on titanium (Ti) surface by one-step (micro-arc oxidation) and two-step methods (micro-arc oxidation and cathodic deposition), and then their surface morphology, composition, biological and antibacterial properties were compared. The results showed that the porous coatings containing Ca/P/Ag achieved by different methods showed similar surface morphology and elemental composition, however, by one-step method, silver existed in the coating as silver phosphate, while in the coatings prepared by two-step method, silver existed as metallic silver. Although both coatings showed excellent antibacterial property (the antimicrobial rate is over 99.9%), the surface coating prepared by one-step method had a more suitable release curve of Ag. In addition, the surface coating prepared by one-step method also presented better biological property, which was due to its enhanced surface roughness and hydrophilicity. Combining with its easy operation and long-term antibacterial property, its prospect for clinical application is more promising.

中文翻译：

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一步法和两步法制备含Ca / P / Ag的TiO 2涂层的生物和抗菌性能

多孔TiO ₂通过一步法（微弧氧化）和两步法（微弧氧化和阴极沉积）分别在钛（Ti）表面上制备含Ca / P / Ag的涂层，然后对其表面形貌，组成，生物和抗菌性能进行了比较。结果表明，采用不同方法制得的含Ca / P / Ag的多孔涂层具有相似的表面形貌和元素组成，但是通过一步法，镀层中的银以磷酸银的形式存在，而通过两步法制备的涂层中步骤法，银作为金属银存在。尽管两种涂层均显示出优异的抗菌性能（抗菌率超过99.9％），但通过一步法制备的表面涂层具有更合适的Ag释放曲线。此外，通过一步法制备的表面涂层还具有更好的生物学性能，这归因于其增强的表面粗糙度和亲水性。结合其易于操作和长期的抗菌性能，其临床应用前景更加广阔。