Preparation Technology and Experimental of Hydro-Thermal Method on Surface Modification of Biomedical Titanium

Titanium and its alloys are widely used in biomedical devices and components, especially as hard tissue replacements as well as in cardiac and cardiovascular applications due to their high specific strength, excellent corrosion resistance and stable moderate temperature properties. However, low hardness and poor wear resistance limit their more extensive practical applications. Therefore, surface modification is often performed to improve the properties of titanium. This article reviews various technologies about surface modification pertaining to titanium and titanium alloys. Meanwhile, nano titaniium dioxide on medical titanium surface was prepared by hydrothermal method. The results indicate that with different concentration of NaOH, the morphology of nano titaniium dioxide has been changed by the nanofibers, nanoflakes and nanotubes. The coatings after hydrothermal pretreatment are expected to show better bioactivity owing to their TiO2 nanostructure.