Method of implanting biostable elastomeric polymers having quaternary carbons
First Claim
1. A method of implanting a biostable prosthesis, comprising the steps of:
- providing a crack-resistant biostable prosthesis by a process of extruding, molding, spraying, casting or forming a film of polyolefin copolymer on a surface to form said crack-resistant, biostable prosthesis;
said polyolefin copolymer comprising a first rubbery component which when homopolymerized produces a polymer having a low level of hardness, a second hardening component which when homopolymerized produces a polymer having high level of hardness to form a polyolefin copolymer which is elastomeric and has a hardness intermediate said low and high levels of hardness, and the polyolefin copolymer having a backbone in which the majority of polymer linkages along the copolymer chain are alternating quaternary and secondary carbon atoms; and
implanting said crack-resistant biostable prosthesis under in vivo implantation conditions whereby cracking of said polyolefin polymer is substantially prevented during in vivo implantation for substantial periods of time.
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Abstract
An article of manufacture and method of making and implanting the article made of a polyolefin star or linear copolymer are disclosed in which the polyolefin copolymer is biostable and crack-resistant when implanted in vivo. The polyolefin copolymer is the reaction product of a rubbery component which when homopolymerized produces a polymer having a low level of hardness, and a hardening component which when homopolymerized produces a polymer having a high level of hardness. The polyolefin copolymer is elastomeric, has a hardness intermediate the low and high levels of hardness, and has a backbone in which the majority of polymer linkages along the copolymer chain are alternating quaternary and secondary carbon atoms.
75 Citations
21 Claims
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1. A method of implanting a biostable prosthesis, comprising the steps of:
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providing a crack-resistant biostable prosthesis by a process of extruding, molding, spraying, casting or forming a film of polyolefin copolymer on a surface to form said crack-resistant, biostable prosthesis;
said polyolefin copolymer comprising a first rubbery component which when homopolymerized produces a polymer having a low level of hardness, a second hardening component which when homopolymerized produces a polymer having high level of hardness to form a polyolefin copolymer which is elastomeric and has a hardness intermediate said low and high levels of hardness, and the polyolefin copolymer having a backbone in which the majority of polymer linkages along the copolymer chain are alternating quaternary and secondary carbon atoms; andimplanting said crack-resistant biostable prosthesis under in vivo implantation conditions whereby cracking of said polyolefin polymer is substantially prevented during in vivo implantation for substantial periods of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification