ABSTRACT
The fast technological evolution of polymers has made it possible to apply these materials to medical devices over the last three decades. In particular, because of their excellent biocompatibility and biofunctions, polymers are expected to show excellent properties for use as biomaterials; in fact, many devices made from metals have been replaced by others made from polymers. In spite of this fact, about 80% of implant devices are still made from metals, and this percentage remains unchanged because of their high strength, toughness, and durability. Medical devices consisting of metals cannot be replaced with polymers at present.
