time-dependent changes in the phagocyte/polymer interface suggested degradation of porous implants made of estane polyether urethane , polypropylene oxide , and a poly ( ethylene oxide hydantoin ) and poly ( tetramethylene terephthalate ) segmented polyether polyester copolymer ( hpoe/pbt copolymer ) , but not of dense silastic silicone rubber implants .
C0032521
polymer
C0032474
polyester