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US 9,173,973 B2Granted
Bioabsorbable polymeric composition for a medical device
OwnerG. Lawrence Thatcher, Robert J. Cottoneinventors
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Abstract
A biodegradable and biocompatible nontoxic polymeric composition is provided which includes a base material such as a crystallizable polymer, copolymer, or terpolymer, and a copolymer or terpolymer additive. Medical devices manufactured from the composition are also provided.
Claims5
A method for making a bioabsorbable stent comprising the steps of:
- (a) blending a polymer composition comprising a crystallizable bioabsorbable polymer composition, wherein the crystallizable bioabsorbable polymer composition comprises a base polymer comprising a poly(L-lactide) moiety and/or poly(D-lactide) moiety, and/or poly L-lactide-co-PEG moiety, and/or poly D-lactide-co-PEG moiety, linked with a modifying copolymer thereof comprising poly(L-lactide-co-Tri-methylenecarbonate) and/or poly(D-lactide-co-Tri-methylene-carbonate) and/or poly(L-lactide-co-ε-caprolactone) and/or poly(D-lactide-co-ε-caprolactone) in the form of block copolymers or as blocky random copolymers;
- wherein the chirality of the polylactide segments of the modifying copolymer are opposite to the chirality of the polylactide segments of the base polymer;
- and
- (b) molding or extruding said polymer composition to produce a tube, wherein the polymer composition forms a lactide racemate stereo complex crystal structure between the base polymer and the modifying polymer.
1 more element
Dependencies are inferred from the claim text.