【摘 要】
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Three-dimensional(3D)printed titanium alloy implants hold enormous potential in orthopedic applica-tions to avoid stress shielding.However,titanium alloy is bio
【机 构】
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School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Tian
论文部分内容阅读
Three-dimensional(3D)printed titanium alloy implants hold enormous potential in orthopedic applica-tions to avoid stress shielding.However,titanium alloy is bioinert,limiting its application and making surface mod-ification a necessity.In this paper,porous implants were treated by acid etching and anodizing to improve the bioactivity,which was evaluated by simulated body fluid(SBF)immersion test.The results showed that,after sur-face modification,micro-nanocomposite structures were obtained on the titanium surface,and after immersing in SBF for 2 weeks,the implants showed a drastically enhanced apatite forming ability,confirming improved bioactivity.However,the surface structures were different at different positions and it is believed that this phe-nomenon is closely related to the different current densities of the surfaces during anodic oxidation.Our research evaluates the effect of anodic oxidation at different volt-ages on the surface modification and provides a reference for improving the bioactivity of the medical porous implant surface prepared by 3D printing.
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