Crosslinkable macromers
First Claim
1. A method of reducing immediate and chronic adverse reactions to an implanted medical device, comprising:
- providing a medical device,providing a matrix-forming system comprising a multifunctional polymerization initiator and a crosslinikable macromer comprising one or more polymer backbones having pendent polymerizable groups,implanting the medical device within a tissue site with the matrix-forming system positioned between the medical device and the tissue, andpolymerizing the matrix-forming system to form a crosslinked matrix between the medical device and the tissue,wherein the multifunctional polymerization initiator is a non-polymer bound initiator and comprises a non-polymeric core with pendent chemical molecules that are capable of initiating a free radical reaction and pendent chemical molecules capable of reducing immediate and chronic adverse reactions to the medical device.
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Accused Products
Abstract
A crosslinkable macromer system and related methods of preparing the system and using the system in the form of a crosslinked matrix between a tissue site and an implant article such as a tissue implant or on the porous surface of a prosthetic device. The macromer system includes two or more polymer-pendent polymerizable groups and one or more multifunctional initiator groups. The polymerizable groups and the initiator group(s), when polymer-pendent, can be pendent on the same or different polymeric backbones. The macromer system provides advantages over the use of polymerizable macromers and separate, low molecular weight initiators, including advantages with respect to such properties as nontoxicity, efficiency, and solubility. A macromer system of the invention can be used as an interface between the tissue site and implant article in a manner sufficient to permit tissue growth through the crosslinked matrix and between the tissue site and implant. In a preferred embodiment, polymers with pendent polymerizable groups, for use in the macromer system, are prepared by reacting a polysaccharide polymer with a reactive moiety in an organic, polar solvent such as formamide.
93 Citations
15 Claims
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1. A method of reducing immediate and chronic adverse reactions to an implanted medical device, comprising:
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providing a medical device, providing a matrix-forming system comprising a multifunctional polymerization initiator and a crosslinikable macromer comprising one or more polymer backbones having pendent polymerizable groups, implanting the medical device within a tissue site with the matrix-forming system positioned between the medical device and the tissue, and polymerizing the matrix-forming system to form a crosslinked matrix between the medical device and the tissue, wherein the multifunctional polymerization initiator is a non-polymer bound initiator and comprises a non-polymeric core with pendent chemical molecules that are capable of initiating a free radical reaction and pendent chemical molecules capable of reducing immediate and chronic adverse reactions to the medical device. - View Dependent Claims (2, 3, 4, 5, 6, 13, 14, 15)
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7. A coated medical device comprising:
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a medical device, and a matrix-forming system positioned upon the medical device including a multifunctional polymerization initiator and a polymer backbone having pendent polymerizable groups wherein the multifunctional polymerization initiator is a non-polymer bound initiator and comprises a non-polymeric core with pendent chemical molecules that are capable of initiating a free radical reaction and pendent chemical molecules capable of reducing immediate and chronic adverse reactions to the medical device.
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8. A method of reducing immediate and chronic adverse reactions to an implanted medical device, comprising:
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providing an implantable medical device with a surface having sufficient porosity to permit tissue growth in vivo, providing a matrix-forming system comprising a multifunctional polymerization initiator and a crosslinikable macromer comprising one or more polymer backbones having pendent polymerizable groups, implanting the medical device within a tissue site with the matrix-forming system positioned between the medical device and the tissue, and polymerizing the matrix-forming system to form a crosslinked matrix between the medical device and the tissue, wherein the multifunctional polymerization initiator is a polymer bound initiator that comprises a polymeric core with pendent chemical molecules that are capable of initiating a free radical reaction and pendent bioactive groups and wherein the crosslinked matrix promotes tissue growth between the tissue site and the medical device. - View Dependent Claims (10, 11, 12)
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9. A coated medical device comprising:
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an implantable medical device with a surface having sufficient porosity to permit tissue growth in vivo, and a matrix-forming system positioned upon the medical device and configured to promote tissue growth between a host tissue site and the medical device, wherein the matrix-forming system includes a multifunctional polymerization initiator and a polymer backbone having pendent polymerizable groups wherein the multifunctional polymerization initiator is a polymer bound initiator that comprises a polymeric core with pendent chemical molecules that are capable of initiating a free radical reaction and pendent chemical molecules capable of reducing immediate and chronic adverse reactions to the medical device.
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Specification