首页> 外文期刊>International Journal of Electrochemical Science >Iron Based Degradable Foam Structures for Potential Orthopedic Applications
【24h】

Iron Based Degradable Foam Structures for Potential Orthopedic Applications

机译:用于潜在的骨科应用的铁基可降解泡沫结构

获取原文
           

摘要

Iron and iron based alloys have been identified as appropriate biodegradable osteosynthesis materialwith the ability of bearing high loads for the temporary replacement of bones. They combine highstrength at medium corrosion rates. Open cell iron based foams have been manufactured by replicationmethod on the basis of the highly uniform structure of foamed polyurethane by powder metallurgicalapproach. Bare carbonyl iron samples and samples with addition of carbon nanotubes (CNTs) andmagnesium have been tested with respect to their microstructure, their degradation rate, and theircytotoxicity. The electrochemical corrosion behaviour has been studied in Hank solution andphysiological saline solution. Potentiodynamic polarization experiments conducted at 37C indicatedthe increased biodegradation rates resulted from porous structure of foam samples. Corrosion ratesdetermined by the Tafel extrapolation method were in the sequence: Fe-Mg, Fe, Fe-CNTs from higherto lower. The cytotoxicity test showed small proliferation of osteoblastic cells incubated on iron basedsamples.
机译:铁和铁基合金已被确定为具有可承受高负荷以暂时替代骨骼的合适的可生物降解的骨合成材料。它们在中等腐蚀速率下结合了高强度。通过基于粉末冶金方法的发泡聚氨酯的高度均匀结构,已经通过复制方法制造了开孔铁基泡沫。已测试了裸露的羰基铁样品以及添加了碳纳米管(CNT)和镁的样品的微观结构,降解速率和细胞毒性。在汉克溶液和生理盐溶液中研究了电化学腐蚀行为。在37°C下进行的电位动力极化实验表明,由于泡沫样品的多孔结构,生物降解率提高了。通过塔菲尔外推法确定的腐蚀速率依次为:Fe-Mg,Fe,Fe-CNTs从高到低。细胞毒性测试显示在铁基样品上孵育的成骨细胞增殖小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号