Device for regeneration of articular cartilage and other tissue
First Claim
1. A device for facilitating healing of voids in tissue comprising,(a) in its dry state, a macrostructure defining void spaces, the macrostructure comprising a regeneration complex comprising a polyelectrolytic complex and at least one additive mixed or blended into, but not bound to, said polyelectrolytic complex, said additive comprising at least one member selected from the group consisting of a protein, a polysaccharide, a lipid, a synthetic polymer, and a ceramic, said regeneration complex possessing sufficient structural integrity as to permit handling, the device being suitable and arranged for implantation into said void of said tissue of a living being;
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Abstract
An implantable device for facilitating the healing of voids in bone, cartilage and soft tissue is disclosed. A preferred embodiment includes a cartilage region comprising a polyelectrolytic complex joined with a subchondral bone region. The cartilage region, of this embodiment, enhances the environment for chondrocytes to grow articular cartilage; while the subchondral bone region enhances the environment for cells which migrate into that region'"'"'s macrostructure and which differentiate into osteoblasts. A hydrophobic barrier exists between the regions, of this embodiment. In one embodiment, the polyelectrolytic complex transforms to hydrogel, following the implant procedure.
60 Citations
40 Claims
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1. A device for facilitating healing of voids in tissue comprising,
(a) in its dry state, a macrostructure defining void spaces, the macrostructure comprising a regeneration complex comprising a polyelectrolytic complex and at least one additive mixed or blended into, but not bound to, said polyelectrolytic complex, said additive comprising at least one member selected from the group consisting of a protein, a polysaccharide, a lipid, a synthetic polymer, and a ceramic, said regeneration complex possessing sufficient structural integrity as to permit handling, the device being suitable and arranged for implantation into said void of said tissue of a living being; - and
(b) wherein in a hydrated state, at least one region of said device swells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 39)
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- 31. A device for facilitating healing of voids in tissue comprising, in its dry state, a polyelectrolytic complex in the form of a three-dimensional architecture defining void spaces, said polyelectrolytic complex possessing sufficient strength as to permit handling, said device furthermore comprising at least one additive unbound to said polyelectrolytic complex, said at least one additive selected from the group consisting of a protein, a polysaccharide, a lipid, a synthetic polymer, and a ceramic, wherein in its hydrated state, at least one region of said device is swollen.
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38. A device for facilitating healing of voids in tissue comprising,
(a) in its dry state, a macrostructure defining void spaces, the macrostructure comprising a regeneration complex comprising a polyelectrolytic complex and at least one additive mixed or blended into, but not bound to, said polyelectrolytic complex, said additive comprising at least one member selected from the group consisting of a lipid and a ceramic, said regeneration complex polyelectrolytic complex fibers formed from chitosan and hyaluronic acid, regions of chitosan not bound to said polyelectrolytic complex fibers, and regions of hyaluranic acid not bound to said polyelectrolytic complex fibers, (b) wherein upon hydration the regeneration complex forms a three dimensional network of polyeletrolytic complex filaments and chitosan and hyaluronic acid viscoelastic gel, (c) the device being suitable and arranged for implantation into said void of said tissue of a living being.
Specification