Formation of an Anti-Bacterial Oxide Film on Ti-Ta Alloy by Anodic Oxidation

Abstract

Recently, Ti–Ta alloys have been expected to be as candidates for dental or orthopedic implants because of their low elastic modulus and high corrosion resistance. However, Ti–Ta alloys do not have the properties to protect against bacterial infection. An anti-bacterial coating was fabricated on the Ti-Ta alloy surface by anodic oxidation (AO) and its surface properties were investigated. The anodic oxidized (AOed) film exhibited a roughened surface dotted with micropores. In addition, the AOed surface is more hydrophilic than the Ti-Ta alloy. The results of an anti-bacterial test revealed that the AOed surface possessed excellent anti-bacterial rate against Staphylococcus aureus (98.5%).

Progress of research on the surface functionalization of tantalum and porous tantalum in bone tissue engineering

“…Moreover, due to the diverse antibacterial mechanisms of Ag, it rarely causes resistance, making it a suitable choice for improving treatment [155,156]. Lin et al loaded Ag ions onto the surface of a titanium-tantalum alloy through a glandular oxidation method and then demonstrated through antibacterial experiments that the loading of Ag ions significantly improved the resistance of the alloy to S. aureus [122].…”