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Biomaterials Translational ›› 2021, Vol. 2 ›› Issue (3): 236-247.doi: 10.12336/biomatertransl.2021.03.06

• REVIEW • Previous Articles     Next Articles

Research and development strategy for biodegradable magnesium-based vascular stents: a review

Jialin Niu1, Hua Huang1, Jia Pei1, Zhaohui Jin1, Shaokang Guan2, Guangyin Yuan1,*()   

  1. 1 National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
    2 School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan Province, China
  • Received:2021-06-03 Revised:2021-08-25 Accepted:2021-09-10 Online:2021-09-28 Published:2021-09-28
  • Contact: Guangyin Yuan E-mail:gyyuan@sjtu.edu.cn
  • About author:Guangyin Yuan, gyyuan@sjtu.edu.cn.

Abstract:

Magnesium alloys are an ideal material for biodegradable vascular stents, which can be completely absorbed in the human body, and have good biosafety and mechanical properties. However, the rapid corrosion rate and excessive localized corrosion, as well as challenges in the preparation and processing of microtubes for stents, are restricting the clinical application of magnesium-based vascular stents. In the present work we will give an overview of the recent progresses on biodegradable magnesium based vascular stents including magnesium alloy design, high-precision microtubes processing, stent shape optimisation and functional coating preparation. In particular, the Triune Principle in biodegradable magnesium alloy design is proposed based on our research experience, which requires three key aspects to be considered when designing new biodegradable magnesium alloys for vascular stents application, i.e. biocompatibility and biosafety, mechanical properties, and biodegradation. This review hopes to inspire the future studies on the design and development of biodegradable magnesium alloy-based vascular stents.

Key words: biodegradable magnesium alloy vascular stents, functional coatings synthesis, high-precision microtubes processing, magnesium alloy design, stent shape optimisation