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This study was performed to investigate the surface properties and cell toxicity of the anodized and hydrothermally treated Ti, Ti-6Al-4V alloy and Ti-6Al-7Nb alloy. Bioactivity was evaluated from the surface activation layers formed on the surface of specimens in simulated body fluid (SBF) for a period of 30 days. Cell toxicity was evaluated based on the optical density of the survival cell. The porous oxide films were formed on all of the specimens by anodic oxidation. The oxide films of Ti were composed of strong anatase peaks without rutile peaks, Ti-6Al4V alloy was composed of weak anatase peaks and weak rutile peaks and Ti-6Al-7Nb alloy was composed of strong anatase peaks and weak rutile peaks. The oxide films of all of the specimens exhibited an increase in the intensity of anatase peaks after hydrothermal treatment. The surface activation layers were formed only on the oxide films of Ti-6Al-7Nb alloy, also this alloy presented a significantly higher optical density than Ti and Ti-6Al-4V alloy on the MTT assay for cell toxicity evaluation. [doi:10.2320/matertrans.47.2033]

Evaluation of Cell Toxicity and Surface Properties of Surface Modified Ti and Ti Alloys