Abstract:

BACKGROUND: The ultraviolet (UV) as one new titanium surface treatment has become the research spot in recent years for the surface hydrophilicity of titanium can be enhanced significantly after UV treatment.
OBJECTIVE: To explore the degradation and mineralized abilities induced by photocatalysis on titanium surface after UV treatment.
METHODS: Machined and micro-arc oxidation titanium samples were treated with UV. The photocatalysis stimulated by UV was detected by the degradation of methylene blue. The generation of apatite of the samples was evaluated by immersing in the simulated body fluid in vitro. Absorbance values of methylene blue at 12 hours were measured by microplate reader. The morphology of the sample surfaces after apatite deposition was observed under scanning electron microscopy at 2 weeks and the crystalline phase of sample surfaces was detected by X-ray diffraction.
RESULTS AND CONCLUSION: The photocatalytic degradation ability on the micro-arc oxidation titanium surfaces was stronger than the machined surfaces after UV treatment (P < 0.05). The mineralized ability of the micro-arc oxidation titanium surfaces were significantly enhanced after UV treatment. The results indicated that UV as one new titanium surface treatment has a good prospect which can enhance the bioactivity of titanium.