Abstract:

BACKGROUND: Polymer coating can improve the degradation and biocompatibility of magnesium alloy stents.
OBJECTIVE: To review the properties of polymer coating for magnesium alloy coronary stents.
METHODS: The first author searched Elsevier and CNKI databases for relevant articles about biodegradable coronary stents, biomedical polymer materials and surface modification of magnesium alloys published from 1995 to 2010.
RESULTS AND CONCLUSION: Polymer materials for coating magnesium alloy include collagen, chitosan, polylactic acid and its copolymers, organic compound conversion coatings, polyurethane. These polymer materials have good biological performance, and can improve the biocompatibility and slow degradation time of the magnesium alloy. However, the bonding strength between the organic and magnesium alloy mainly depends on the physical force and chemical bonding. As the mechanical force cannot meet the requirements, we must deal with the surface of magnesium alloy and organic, and adopt suitable surfactant to produce chemical bonding between the organic and magnesium alloy in order to meet the requirements.