Devices and Methods for Tissue Engineering
First Claim
Patent Images
1. A method of fabricating a porous tissue scaffold comprising:
- providing glass fibers having a bioactive composition, the glass fibers having a diameter in the range of about 1 to 200 μ
m;
providing a bonding agent comprising particles having a bioactive composition;
providing a binder;
providing a pore former having a particle size in the range of about 0.1 to about 100 times the diameter of the glass fibers;
mixing the glass fibers, the bonding agent, the binder, and the pore former to provide a homogeneous mixture;
directing the mixture into a cavity;
forming the mixture into a solidified shaped object using the cavity;
removing the binder and the pore former from the shaped object; and
bonding the glass fibers into a porous structure using the bonding agent.
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Abstract
A resorbable tissue scaffold fabricated from bioactive glass fiber forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the space between the bioactive glass fiber in the porous matrix. Strength of the bioresorbable matrix is provided by bioactive glass that fuses and bonds the bioactive glass fiber into the rigid three-dimensional matrix. The resorbable tissue scaffold supports tissue in-growth to provide osteoconductivity as a resorbable tissue scaffold, used for the repair of damaged and/or diseased bone tissue.
84 Citations
20 Claims
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1. A method of fabricating a porous tissue scaffold comprising:
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providing glass fibers having a bioactive composition, the glass fibers having a diameter in the range of about 1 to 200 μ
m;providing a bonding agent comprising particles having a bioactive composition; providing a binder; providing a pore former having a particle size in the range of about 0.1 to about 100 times the diameter of the glass fibers; mixing the glass fibers, the bonding agent, the binder, and the pore former to provide a homogeneous mixture; directing the mixture into a cavity; forming the mixture into a solidified shaped object using the cavity; removing the binder and the pore former from the shaped object; and bonding the glass fibers into a porous structure using the bonding agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of fabricating a porous tissue engineering scaffold comprising:
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providing fiber having a bioactive composition; providing a bonding agent; providing a binder; providing a pore former; mixing the fiber, the bonding agent, the binder, and the pore former into a homogeneous mixture; forming the mixture into a solidified shaped object; removing the binder and the pore former; and heat treating the shaped object to bond the bioactive fiber into a porous structure using the bonding agent, the porous structure having interconnected porosity. - View Dependent Claims (10, 11, 12, 13)
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14. A method of fabricating a porous coating on an orthopedic implant, the method comprising:
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providing an orthopedic implant; providing fiber having a bioactive composition; providing a bonding agent; providing a binder; providing a pore former; mixing the fiber, the bonding agent, the binder, and the pore former into a homogeneous mixture; forming the mixture into a solidified shaped object on at least a portion of the orthopedic implant; removing the binder and the pore former; and heat treating the shaped object to bond the bioactive fiber and the bonding agent into a porous structure and simultaneously bonding at least a portion of the bioactive fiber and the bonding agent to the orthopedic implant, the porous structure having interconnected porosity. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification