Nanocrystalline layer on the bearing surfaces of artificial hip implants induced by biotribocorrosion processes

Nanocrystalline layer on the bearing surfaces of artificial hip implants induced by biotribocorrosion processes
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生物摩擦腐蚀过程引起的人工髋关节植入物承载表面上的纳米晶层

DOI:
10.1016/j.bsbt.2015.05.001
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发表时间:
2015-06
影响因子:
--
通讯作者:
Lijie Qiao
Lijie Qiao
中科院分区:
--
文献类型:
--
作者:
Zhongwei Wang;Yu Yan;Lijie Qiao

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骨科假体由含有蛋白质的假滑液润滑。在常规运动下,轴承表面会受到磨损和腐蚀。更重要的是,它们的相互作用控制着材料的降解过程。摩擦腐蚀试验后,CoCrMo合金表面出现了纳米晶层。在0.9%NaCl和0.9%NaCl +1%牛血清白蛋白(BSA)溶液中进行摩擦腐蚀试验。采用小角X射线散射法测量了纳米晶的粒度分布。作为一般结论,蛋白质可以吸附在假体材料上,并在滑动过程中充当润滑剂。材料表面的负电荷分布可以促进蛋白质的吸附。轴承表面上的纳米晶体的平均尺寸为5nm。
Orthopedic prostheses are lubricated by a pseudosynovial fluid that contains proteins. Under regular movements, bearing surfaces would suffer wear and corrosion. More importantly, their interaction controls the material degradation process. Nanocrystalline layer was found on the surface of CoCrMo alloy surface after tribocorrosion tests. Tribocorrosion tests were taken in 0.9% NaCl and 0.9% NaCl with 1% bovine serum albumin (BSA) solution. Small angle X-ray Scattering was applied to measure the size distribution of the nano-crystals. As a general conclusion, proteins can absorb on prosthesis materials and act as a lubricant during sliding. The negative charge distribution on the material surface can promote the adsorption of protein. The average size of the nano-crystals on the bearing surface was 5 nm.
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