Abstract:
A meniscus repair composition for application to a meniscus defect site to promote growth of new tissue at the meniscus defect site is provided. The composition comprises: from about 10 to about 50 percent by weight of allograft meniscus particles having an average particle size of from about 10 µm to about 500 µm; a carrier selected from the group consisting of sodium hyaluronate, gelatin, collagen, polyethylene glycol, glycerin, carboxymethylcellulose, dextrose, blood derivatives, aqueous solutions thereof, and mixtures thereof; and a curing agent. The curing agent may be the carrier where the carrier is cross-linkable. When introduced to a defect site in a meniscus and cured, the composition will not flow away from the defect site, and the composition is non-adhering to the defect site after it is cured.
Abstract:
Mixtures, such as gels or pastes, comprising freeze-milled cartilage particles and exogenous growth factors are used for repairing chondral defects. Such mixtures may be applied to constructs comprising cancellous bone for implantation at the defect site. Suitable growth factors include variants of FGF-2, particularly variants that include a sole amino acid substitution for asparagine at amino acid 111 of the β8-β9 loop of the FGF-2 peptide. Such FGF-2 variants are released slowly and continuously at a constant rate from cartilage pastes. In other embodiments, the amino acid substituted for asparigine is glycine. Other variants that may be used include FGF-9 variants having truncated chains and a sole amino acid substitution in the β8-β9 loop of the FGF-9 peptide either for tryptophan at amino acid 144 or for asparagine at amino acid 143.
Abstract:
Constructs that are at least partially constructed of allograft cancellous bone are disclosed, along with cartilage particles that may be used with the constructs for repairing articular cartilage defects. A multi-piece construct (20) includes a base member (22), a cap member (30) and at least one pin (40) that secures the cap member (30) to the base member (20). The base member (22) may be constructed of mineralized cancellous bone, and is used to replace the subchondral bone removed when a surgeon cuts a bore in the area of an adjacent cartilage defect. The base member (22) includes a blind bore (23) and first and second through-going transverse bores (28, 29) in opposite sides of a wall of the base member (22). The cap member (30) includes an upper section (32) that has a thickness that is similar to that of a patient's surrounding articular cartilage layer and a stem (36) depending from the upper section (32) that is dimensioned to be received in and by the blind bore (23) of the base member (22). The stem (36) includes a transverse through-going bore (37), which may be aligned with the transverse through-going bores (28, 29) of the base member (22) to receive the pin (40) therein when the construct (20) has been assembled. The cap member (30) is at least partially formed of demineralized allograft cancellous bone, into which a mixture containing lyophilized, freeze-milled allograft cartilage particles may be infused for the repair of articular cartilage defects. The cartilage particles have a size within a range of from about 10 microns to about 210 microns.
Abstract:
A composition for spinal disc repair comprising a plurality of uniformly shaped demineralized cancellous bone pieces ranging in size from about 2.0mm to about 4.0mm loaded into a porous mesh container with the cancellous bone pieces being treated so that they are not osteoinductive and are packed in the porous mesh container under compression forces.
Abstract:
A sterile implant for treatment of a spinal disc defect comprising an allograft cortical bone demineralized to a Type I collagen having a specific shape which is treated to eliminate osteoinductivity. The implant is lyophilized and compressed into smaller first shape which 20 to 80% from its original shape in at least one dimension and hardened. The implant expanding when hydrated into a second shape having the shape memory of the first shape and expanded in dimensional size from the first compressed shape.
Abstract:
Implants comprising a plurality of separate cortical bone units (10). which have been at least partially demineralized and are osteoinductive, are described herein. The implants can be used in methods for treating bone. Also, disclosed are methods for treating spinal conditions using these implants. The spinal conditions include but are not limited to repairing damage to or defects in the spine, such as fractures in a vertebral (30) body or degeneration of spinal discs.
Abstract:
Mixtures, such as gels or pastes, comprising freeze-milled cartilage particles and exogenous growth factors are used for repairing chondral defects. Such mixtures may be applied to constructs comprising cancellous bone for implantation at the defect site. Suitable growth factors include variants of FGF-2, particularly variants that include a sole amino acid substitution for asparagine at amino acid 111 of the ß8-ß9 loop of the FGF-2 peptide. Such FGF-2 variants are released slowly and continuously at a constant rate from cartilage pastes. In other embodiments, the amino acid substituted for asparigine is glycine. Other variants that may be used include FGF-9 variants having truncated chains and a sole amino acid substitution in the ß8-ß9 loop of the FGF-9 peptide either for tryptophan at amino acid 144 or for asparagine at amino acid 143.
Abstract:
The invention is directed toward a cartilage repair assembly (10) comprising a shaped allograft construct comprising a cylindrical mineralized cancellous bone base member (12) and a demineralized cancellous bone cap member (20) having a cylindrical top portion (22) and a stem (26) extending from the top portion (22) mounted to the bone base member (12). The base member (12) has a central bore (14) and a transverse bore (16) which intersects the central bore (14) and the cap member stem (26) has a through-going bore (28) which is aligned with the base member transverse bore (16) when the stem (26) is mounted in the central bore (14) to receive a pin member (30). Milled cartilage particles having a size ranging from 10 to 212 microns are mixed with a biocompatible carrier and a cartilage growth factor, with the mixture being infused in the cap member (20) to generate cartilage growth.
Abstract:
A meniscus repair composition for application to a meniscus injury to promote growth of new tissue at the meniscus injury site is provided. The composition comprises: from about 10 to about 50 percent by weight of allograft meniscus particles having an average particle size of from about 10 μm to about 500 μm; and a carrier comprising a solid fibrin web matrix. When introduced to a defect site in a meniscus, the composition is non-adhering to the defect site. A method for repairing a meniscus injury comprises administering a meniscus repair composition to the injury site.
Abstract:
A meniscus repair composition for application to a meniscus injury to promote growth of new tissue at the meniscus injury site is provided. The composition comprises: from about 10 to about 50 percent by weight of allograft meniscus particles having an average particle size of from about 10 µm to about 500 µm; and a carrier comprising a solid fibrin web matrix. When introduced to a defect site in a meniscus, the composition is non-adhering to the defect site. A method for repairing a meniscus injury comprises administering a meniscus repair composition to the injury site.