Fabricating an implantable medical device from an amorphous or very low crystallinity polymer construct
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United States of America Patent
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Sep 17, 2013
Grant Date -
May 30, 2013
app pub date -
Jan 18, 2013
filing date -
Aug 11, 2008
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Abstract
Methods of fabricating a polymeric implantable device with improved fracture toughness through annealing, nucleating agents, or both are disclosed herein. A polymeric construct that is completely amorphous or that has a very low crystallinity is annealed with no or substantially no crystal growth to increase nucleation density. Alternatively, the polymer construct includes nucleating agent. The crystallinity of the polymer construct is increased with a high nucleation density through an increase in temperature, deformation, or both. An implantable medical device, such as a stent, can be fabricated from the polymer construct after the increase in crystallinity.
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