Composite grafts, systems, and methods

• US 10,279,081 B2
• Filed: 10/26/2015
• Issued: 05/07/2019
• Est. Priority Date: 10/24/2014
• Status: Active Grant

• Current Assignee: AlloSource
• Original Assignee: AlloSource
• Inventors: Samaniego, Adrian C., Southard, Matthew, Blood, Kenneth
• Primary Examiner(s): Wu, Julie
• Assistant Examiner(s): White, Douglas F
• Application Number:
  US14/923,087
• Publication Number:
  US 20160114079A1
• Time in Patent Office: 1,289 Days
• Field of Search: None
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61L 2300/414 Growth factors
• CPC Class Codes: A61L 2300/64 Animal cells
• CPC Class Codes: A61L 27/3604 characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
• CPC Class Codes: A61L 27/3834 Cells able to produce different cell types, e.g. hematopoietic stem cells, mesenchymal stem cells, marrow stromal cells, embryonic stem cells
• CPC Class Codes: A61L 27/54 Biologically active materials, e.g. therapeutic substances A61L27/227 takes precedence

Abstract

Composite grafts including a biocompatible, synthetic scaffold; and a biological tissue component obtained or derived from a deceased donor tissue, wherein the biological tissue component is embedded in the biocompatible, synthetic scaffold, are provided as systems relating thereto. Methods of manufacture and methods of treatment using such grafts are also provided.

Claims

1. A composite graft, comprising:

a biocompatible, synthetic scaffold; and

a biological tissue component obtained or derived from a deceased donor tissue, wherein the biological tissue component is embedded in the biocompatible, synthetic scaffold, wherein;

the composite graft is porous or has one or more porous regions,

the biological tissue component comprises bone particles, cartilage particles, or collagen particles,

the biological tissue component comprises particles having an average diameter from 0.01 mm to 5 mm, and

the particles are embedded in the biocompatible, synthetic scaffold, and

the composite graft is formed by;

combining the biological tissue component with a curing solution to form a composite mixture, the curing solution comprising at least one polymerizing agent,

disposing the composite mixture into a mold, and

curing the composite mixture for a predetermined period of time at a predetermined temperature to form the composite graft, the predetermined period of time at a predetermined temperature being sufficient to cause the polymerizing agent to polymerize into the biocompatible, synthetic scaffold, wherein the polymerizing agent, when solidified, has a durometer in the range of between 10 and 65.

2. The composite graft of claim 1, wherein the biocompatible, synthetic scaffold comprises a polymerized silicone, polyacrylamide, cellulose, or polyethylene, or combination thereof.

3. The composite graft of claim 1, wherein the biocompatible, synthetic scaffold comprises a polymerized silicone.

4. The composite graft of claim 1, wherein the deceased donor tissue comprises at least one connective tissue, epithelial tissue, muscle tissue, or nervous tissue.

5. The composite graft of claim 1, wherein the composite graft comprises at least one added protein, added cell, pharmaceutical agent, hydration-aiding compound, or combination thereof.

6. The composite graft of claim 5, wherein the added protein is a growth factor.

7. The composite graft of claim 5, wherein the added cell is a mesenchymal stem cell.

8. The composite graft of claim 5, wherein the pharmaceutical agent is an antibiotic, a pain-relieving medication, an anti-inflammatory, or combination thereof.

9. The composite graft of claim 5, wherein the hydration-aiding compound comprises a carboxymethyl cellulose.

10. The composite graft of claim 1, wherein the biocompatible, synthetic scaffold is water insoluble, non-biodegradable, or a combination thereof.

11. A method of treating a subject in need of an implant, comprising administering the composite graft of claim 1 at a delivery site in the subject.

12. The method of claim 11, wherein the composite graft is selected based on at least one of the dimensions or the native tissue at the delivery site.

13. The method of claim 11, wherein the biological tissue component of the composite graft is similar to the native tissue at the delivery site.

14. The composite graft of claim 1, wherein the biological tissue component is the deceased donor tissue that has been pulverized or morselized.

15. The composite graft of claim 1, wherein the composite graft is further formed by:

adding a soluble component to the composite mixture, and

removing the soluble component from the composite graft thereby creating voids in the composite graft, the removing comprising disposing the composite graft in a solution into which the soluble component will dissolve for a period of time sufficient to dissolve the soluble component.

16. The composite graft of claim 1, wherein the composite mixture is uniform.

17. The composite graft of claim 5, wherein the composite mixture comprises the at least one added protein, added cell, pharmaceutical agent, hydration-aiding compound, or combination thereof.