期刊
RARE METALS
卷 40, 期 5, 页码 1164-1172出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01413-5
关键词
Three-dimensional (3D) printing; Porous implants; Anodic oxidation; Composite structure; Current density
资金
- National Key Research and Development Program of China [2016YFB1101103]
- National Natural Science Foundation of China [51771069]
This paper investigates the effect of acid etching and anodizing on improving the bioactivity of 3D printed titanium alloy implants, confirming the impact of surface structures on apatite forming ability. The study provides valuable insights for enhancing the bioactivity of medical implants prepared by 3D printing.
Three-dimensional (3D) printed titanium alloy implants hold enormous potential in orthopedic applications to avoid stress shielding. However, titanium alloy is bioinert, limiting its application and making surface modification 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 surface 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 phenomenon is closely related to the different current densities of the surfaces during anodic oxidation. Our research evaluates the effect of anodic oxidation at different voltages 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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