Recent advances in angioplasty have involved the application of polymer coatings to stent surfaces for purposes of drug delivery in order to prevent a reblockage of the artery due to smooth muscle cell proliferation. This advance has reduced instances of such restenosis from ∼40% for bare metal stents to ∼5% for drug eluting stents, and has yielded a milti-billion dollar per annum market. However, delamination of polymer coatings on commercial stents has recently been reported using SEM analysis [1, 2]. Such delamination results from interface failure due to high interface tractions developed in the region of the stent plastic hinge.

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