The aim of this study is to show the developments carried out by us with coated stents,
expansion properties, furthermore the failures of the coatings. The coating was examined before and
after expansion, paying special attention to the curves. The quality and the changing of the coatings
were examined by different methods: optical microscopy, atomic force microscopy, scanning
electron microscopy and EDS analysis. The results show that the expansion to a higher pressure did
not change the coating.
Polyurethane coating was given to TentAur stents. The coatings were produced by a method of
dipping. The sterile and dust free environment is crucial to produce a suitable coating.
Electro-polished and non-electro-polished sheets and stents were used for these experiments. The
quality and the changing of the coatings were examined by different methods after drying. The
fatigue tests showed that the polyurethane coating had suitable adherence
