Preparation of Bio-film on the Surface of Titanium Alloy by Micro-arc Oxidation and Hydro-thermal Synthesis and Its Histocompatibility
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摘要: 采用微弧氧化及水热合成处理方法制备钛合金表面生物膜层。应用扫描电子显微镜,EDS元素能谱及X射线衍射对薄膜的微观形貌、元素成分和相组成进行观察和分析,通过划痕试验检测膜基结合力,并研究试样在Hank’s模拟体液中耐腐蚀性能。将试样高温消毒后,分别植入至动物皮下组织,52 d后取出种植体并进行分析。结果表明:膜层与基体结合力可达26 N左右,MAO-HS试样耐腐蚀性远强于基体试样;试验动物在试验过程中均未发生异常情况,微观形貌分析MAO-HS组试样发现膜层表面存在大量组织攀附,并含有一定比例的C、K元素。对照基体试样组,未见组织攀附。作为种植体材料,较基体合金MAO-HS试样表现出更为优异的组织相容性。Abstract: Micro-arc oxidation(MAO) and hydrothermal synthesis(HS) technologies were used to prepare bio-film on the surface of titanium alloy.Surface morphologies and formation procedures of the films at various stages were observed by scanning electron microscope,and element and phase compositions of biological membrane layer were analyzed by energy dispersive spectroscopy and X-ray diffractometer.The cohesion between films and substrate materials was measured by scratching test,and the corrosion resistance of samples in Hank's simulated body fluid was probed into.MAO-HS samples and titanium alloy substrate samples were implanted into animal subcutaneous tissue after washing and sterilization.After 52 days of implanting,the samples were taken out and observed.The experimental results show that the cohesion between the films and substrates has a higher binding force of up to 26 N or so,and the corrosion resistance of MAO-HS samples is better than titanium alloy substrate specimen.Large tissues clamber over the surface of MAO-HS group,and the membrane layer contains a certain proportion of carbon and kalium element while there is no tissue growth found on the surface of titanium alloy substrates.Compared with the titanium alloy substrate material,MAO-HS samples shows more excellent histocompatibility as implants.
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Key words:
- titanium alloy /
- micro-arc oxidation /
- hydro-thermal synthesis /
- bio-film /
- subcutaneous planting /
- histocompatibility
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