RESORBABLE STRUCTURE FOR TREATING AND HEALING OF TISSUE DEFECTS
First Claim
1. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one modeling agent;
wherein said device comprises a plurality of internal surfaces that define a plurality of said pores, wherein at least said pores are arranged substantially homogeneously throughout said device, wherein said pores are of irregular shapes due to interactions with said at least one modeling agent during processing, and further wherein substantially each of said internal surfaces has expanded at least partially around an external surface of at least one modeling agent, thereby imparting an inward-directed textured or roughened face to said internal surfaces, and wherein said modeling agent is at least partially exposed to said pores, and further wherein said modeling agent chemically reacts upon exposure of said pores to a fluid.
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Accused Products
Abstract
Devices and processes (e.g., improved Plasticized Melt Flow processes (PMF) or improved Phase Separation Polymer Concentration (PSPC), etc.) used to make resorbable and non-resorbable structures for treating and/or healing of tissue defects are disclosed. Among the advantages of using these improved processes are the preservation of molecular weight and the broadening of the processing conditions for temperature sensitive polymers and therapies (e.g. polylactide, polyglycolide, polycaprolactone or Cisplatin, etc.). This reduction in processing temperature, pressure and time can help to preserve the molecular weight and/or integrity of the final product or any additive incorporated therein. Additionally, pore size and shape tailoring can increase the osteoconductive nature of the device.
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Citations
31 Claims
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1. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one modeling agent;
wherein said device comprises a plurality of internal surfaces that define a plurality of said pores, wherein at least said pores are arranged substantially homogeneously throughout said device, wherein said pores are of irregular shapes due to interactions with said at least one modeling agent during processing, and further wherein substantially each of said internal surfaces has expanded at least partially around an external surface of at least one modeling agent, thereby imparting an inward-directed textured or roughened face to said internal surfaces, and wherein said modeling agent is at least partially exposed to said pores, and further wherein said modeling agent chemically reacts upon exposure of said pores to a fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 27)
- said device comprising a polymer matrix, pores, and at least one modeling agent;
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8. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one modeling agent;
wherein said device comprises a plurality of internal surfaces that define a plurality of said pores, said device being manufactured with at least one decompression step;
wherein said pores are of irregular shapes due to interactions with said at least one modeling agent during said decompression step, and specifically wherein during decompression said pores grow in size to an extent where said internal surfaces grow around said at least one modeling agent, thereby modifying the shape of said internal surfaces and causing said modeling agent to chemically react upon exposure of said pores to a fluid. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
- said device comprising a polymer matrix, pores, and at least one modeling agent;
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17. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one modeling agent, and being manufactured with at least one decompression step to expand a pore induction fluid provided to said polymer matrix, thereby shaping at least some of said polymer matrix into the form of walls that define said pores, wherein at least a portion of said pores are induced by expansion of said pore induction fluid during said decompression step, with said pores further being of irregular shape due to interactions with said at least one modeling agent during said decompression step, wherein said modeling agent chemically reacts with a bodily fluid upon exposure to said fluid, and further wherein during decompression said pores grow in size to an extent where said polymeric pore walls stretch around said modeling agent that is or that becomes constrained in its ability to relocate in response to the advancing polymeric pore wall, and thereby provides a textured or roughened face to said pore walls.
- View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one modeling agent;
wherein said device comprises a plurality of internal surfaces that define a plurality of said pores, said device being manufactured by a process comprising at least one decompression step, wherein at least said pores are arranged substantially homogeneously throughout said device, wherein said pores are of irregular shapes due to interactions with said at least one modeling agent during said decompression step, and further wherein during decompression said pores grow in size to an extent where said internal surfaces attempt to grow around said at least one modeling agent that is in a constrained condition, and do in fact push at least slightly beyond a boundary defined by external surfaces of said modeling agent, thereby modifying the shape of said internal surfaces by creating inwardly-directed protrusions thereon, and wherein still further at least a portion of said internal surfaces are defined by at least a portion of said external surfaces of said modeling agent, thereby imparting an inward-directed textured or roughened face to said internal surfaces, and wherein said modeling agent is at least partially exposed to said pores, and further wherein said modeling agent dissolves upon exposure of said pores to a fluid.
- said device comprising a polymer matrix, pores, and at least one modeling agent;
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26. A porous polymeric device, said device being implantable into a body of a living being to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one leachable modeling agent;
wherein said device comprises a plurality of internal surfaces that define a plurality of said pores, wherein at least said pores are arranged substantially homogeneously throughout said device, wherein said pores are of irregular shapes due to interactions with said at least one modeling agent during processing, and further wherein substantially each of said internal surfaces has expanded at least partially around an external surface of at least one modeling agent, thereby imparting an inward-directed textured or roughened face to said internal surfaces, and wherein said leachable modeling agent is at least partially exposed to said pores, and further wherein said leachable modeling agent is capable of being leached from said device upon exposure of said pores to a fluid.
- said device comprising a polymer matrix, pores, and at least one leachable modeling agent;
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28. A porous polymeric device, said device being implantable to treat tissue or defects therein;
- said device comprising a polymer matrix, pores, and at least one polymer matrix-thinning agent comprising at least one metallic stearate selected from the group consisting of the stearates of calcium, magnesium, sodium and zinc, wherein said pores are about 50 to 500 microns in diameter.
- View Dependent Claims (29, 30, 31)
Specification