Prosthetic articular cartilage
DCFirst Claim
1. A prosthetic articular cartilage device comprising a dry porous volume matrix of biocompatible and at least bioresorbable fibers and further comprising a base component,said fibers being natural polymers or analogs or mixtures thereof, said matrix being adapted to have an in vivo outer surface contour substantially the same as that of natural articular cartilage, and said matrix having a pore size in the approximate range of about 100 microns to about 400 microns,whereby said matrix establishes a bioresorbable scaffold adapted for the ingrowth of articular chondrocytes, and for supporting natural articulating joint forces,said base component configured to fit in a complementary aperture in cancellous bone thereby securing said articular cartilage device to said bone, said base component extending from portions of the outer surface of said matrix,said base component being a composite material comprising a dispersion of collagen and a composition which is selected from the group consisting of tricalcium phosphate, hydroxyapatite, and a combination of tricalcium phosphate and hydroxyapatite.
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Abstract
A prosthetic, resorbable articular cartilage and methods of its fabrication and insertion are disclosed. The prosthetic articular cartilage, when implanted in a humanoid joint, acts as a resorbable scaffold for ingrowth of native articular chondrocytes and supports natural articulating joint forces. The prosthetic articular cartilage is a dry, porous, volume matrix of biocompatible and bioresorbable fibers. These fibers include a natural polymer or analogs thereof, at least a portion of which may be crosslinked. The matrix is adapted to have an in vivo outer surface contour substantially the same as that of natural articular cartilage in an articulating joint, and has a pore size in the approximate range of about 100 microns to about 400 microns.
542 Citations
22 Claims
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1. A prosthetic articular cartilage device comprising a dry porous volume matrix of biocompatible and at least bioresorbable fibers and further comprising a base component,
said fibers being natural polymers or analogs or mixtures thereof, said matrix being adapted to have an in vivo outer surface contour substantially the same as that of natural articular cartilage, and said matrix having a pore size in the approximate range of about 100 microns to about 400 microns, whereby said matrix establishes a bioresorbable scaffold adapted for the ingrowth of articular chondrocytes, and for supporting natural articulating joint forces, said base component configured to fit in a complementary aperture in cancellous bone thereby securing said articular cartilage device to said bone, said base component extending from portions of the outer surface of said matrix, said base component being a composite material comprising a dispersion of collagen and a composition which is selected from the group consisting of tricalcium phosphate, hydroxyapatite, and a combination of tricalcium phosphate and hydroxyapatite.
Specification