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采用大气等离子体喷涂技术在钛合金表面上制备常规和纳米结构TiO2涂层。考察了TiO2涂层经紫外光辐照后浸泡于模拟体液(simulated body fluid,SBF)中的生物活性。研究涂层表面状态、紫外光辐照时间和辐照介质对TiO2涂层生物活性的影响。结果表明:经紫外光辐照后的纳米TiO2涂层在SBF中可诱导类骨磷灰石在其表面形成,显示了良好的生物活性,但常规TiO2涂层和磨去表面的纳米TiO2涂层无此种现象发生。紫外光辐照处理时间增长有利于类骨磷灰石的生成。在SBF、水、空气中进行紫外光辐照的纳米TiO2涂层表面均有类骨磷灰石生成,但在水中进行紫外光辐照处理的涂层显示较低的生物活性。
Conventional and nanostructured TiO2 coatings were prepared on titanium alloy surfaces by atmospheric plasma spraying. The biological activity of the TiO2 coating immersed in simulated body fluid (SBF) irradiated by UV light was investigated. The effects of coating surface condition, UV irradiation time and irradiation medium on the biological activity of TiO2 coating were investigated. The results show that nano-TiO2 coating irradiated by UV light can induce the formation of bone-like apatite on the surface of SBF, showing good biological activity. However, conventional TiO2 coating and nano-TiO2 coating No such phenomenon occurs. UV radiation treatment time is conducive to the growth of bone-like apatite. Bovine apatite was produced on the surfaces of nanostructured TiO 2 coatings irradiated by UV light in SBF, water and air, but the coating irradiated with UV light in water showed lower bioactivity.