Nanosurface Modifacation of Biomedical β Titanium Alloy for Dental Implant and its Antibacterial Property

The TiO2 nanotube array film was synthesized on the surface of Ti-Nb-Zr-Mo βTitanium alloy via anodic oxidation in single electrolytic solution only containing HF. The diameter of TiO2 nanotubes was 30-50nm, and the length was 240nm. Compared with the processing parameters (including anodizing voltage, reaction time, concentration and kinds of electrolytic solution) used for pure Titanium or Ti-6Al-4V alloy, the parameters was further optimized. The surface morphology and element compositions Ti-Nb-Zr-Mo alloy before and after anodic oxidation were observed and analyzed by a scanning electron microscope (SEM) and an energy dispersive X-ray (EDX) spectrometer. The antibacterial property of TiO2 nanotube array film prepared with optimal conditions was evaluated by coculture in vitro between Actinomyces viscosus and materials tested. The results indicated that the TiO2 nanotube array film had very good antibacterial activity to resist Actinomyces viscosus. TiO2 nanotube array film/Ti-Nb-Zr-Mo βTi alloy biocomposite will be an more excellent dental implant owning good biomechanical adaptability, biocompatibility and antibacterial property.