Polyetheretherketone for long-term implantable devices. 
Extremely few new polymeric materials become adopted by the medical device industry.  This is partly because of the quality of existing materials and partly a consequence of the high costs of introducing new ones.  The polyaryletherketones, especially polyetheretherketone (PEEK) has broken this trend and is rapidly emerging as a contender for high performance implantable applications.