A review on biodegradable materials for cardiovascular stent application

Abstract

A stent is a medical device designed to serve as a temporary or permanent internal scaffold to maintain or increase the lumen of a body conduit. The researchers and engineers diverted to investigate biodegradable materials due to the limitation of metallic materials in stent application such as stent restenosis which requires prolonged anti platelet therapy, often result in smaller lumen after implantation and obstruct re-stenting treatments. Biomedical implants with temporary function for the vascular intervention are extensively studied in recent years. The rationale for biodegradable stent is to provide the support for the vessel in predicted period of time and then degrading into biocompatible constituent. The degradation of stent makes the re-stenting possible after several months and also ameliorates the vessel wall quality. The present article focuses on the biodegradable materials for the cardiovascular stent. The objective of this review is to describe the possible biodegradable materials for stent and their properties such as design criteria, degradation behavior, drawbacks and advantages with their recent clinical and preclinical trials.

Keywords

biodegradable materials / magnesium alloy / polymers / biodegradable stent / cardiovascular stent

References

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Acknowledgements

This work was supported by the National Natural Science Fund for Young Scientists of China (Grant No. 51301049), the Fundamental Research Funds for the Central Universities (Grant No. HEUCF201310024), the National Natural Science Foundation of China (Grant No. 81271676), and the National High Technology Research and Development Program of China (863 Program; Grant No. 2009AA03Z423).

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