High density fibrous polymers suitable for implant
View Patent ↗This invention includes malleable, biodegradable, fibrous compositions for application to a tissue site in order to promote or facilitate new tissue growth. One aspect of this invention is a fibrous component that provides unique mechanical and physical properties. The invention may be created by providing a vessel containing a slurry, said slurry comprising a plurality of natural or synthetic polymer fibers and at least one suspension fluid, wherein the polymer fibers are substantially evenly dispersed and randomly oriented throughout the volume of the suspension fluid; applying a force, e.g., centrifugal, to said vessel containing said slurry, whereupon said force serves to cause said polymer fibers to migrate through the suspension fluid and amass at a furthest extent of the vessel, forming a polymer material, with said polymer material comprising polymer fibers of sufficient length and sufficiently viscous, interlaced, or interlocked to retard dissociation of said polymer fibers.
1. A method for creating a biocompatible polymer implant suitable for implantation into a living being comprising the steps of:
a. providing a vessel containing a low concentration slurry, said slurry providing a plurality of polymer fibers, a particulate and at least one suspension fluid wherein the fibers and particulate are substantially evenly dispersed and randomly oriented throughout the volume of suspension fluid;
b. applying a gyroscopic force to said vessel containing said slurry, whereupon said gyroscopic force serves to cause said polymer fibers and particulate to migrate through, and flocculate within said suspension fluid creating clumps of interlaced fibers containing the particulate; and
c. exposing said interlaced, flocculated fibrous clumps containing particulate to a force that extracts at least a portion of said suspension fluid, thereby allowing the fibers of the interlaced, flocculated clumps to become interlocked with one another.
2. The method of claim 1 , wherein said slurry further comprises a lubricant.
3. The method of claim 1 , wherein the slurry has a percentage mass of polymer fibers dispersed in the said suspension fluid of less than about 15% by weight.
4. The method of claim 1 , wherein said slurry has a percentage mass of polymer fibers dispersed in the suspension fluid in the range of about 3 to about 5% by weight.
5. The method of claim 1 , wherein at least a portion of said polymer is at least one biopolymer selected from the group consisting of collagen, chitosan, alginate, hyaluronic acid, poly-lactic acid, poly-glycolic acid, poly-caprolactone, and polyurethane.
6. The method of claim 1 , wherein said slurry further comprises a biologically active agent.
7. The method of claim 1 , wherein said particulate is at least one of ceramic, glass, glass-ceramic, metals, tricalcium phosphate, hydroxylapatite, calcium sulfate, autologous bone graft, allograft bone matrix, demineralized bone, polymers, microspheres, microcapsules, hyaluronic acid, collagen, chitosan, alginate, poly-lactic acid, poly-glycolic acid, poly-caprolactone, polyurethane or combinations thereof.
8. The method of claim 1 , further comprising the steps of:
d. extracting said suspension fluid from said polymer implant to form a dried implant;
e. sterilizing said dried implant; and
f. packaging said dried implant.
9. The method of claim 8 , further comprising the step of:
g. adding a rehydrating fluid to the dried implant.
10. The method of claim 9 , wherein said rehydrating fluid comprises a biologically active agent.
11. The method of claim 9 wherein the dried implant becomes a putty upon rehydration.
12. The method of claim 1 , wherein the flocculated clumps are interlocked around a reinforcing material.
13. The method of claim 12 , wherein said reinforcing material comprises a mesh.
14. The method of claim 12 , wherein said reinforcing material comprises fibrous threads.
15. The method of claim 1 , wherein said particulate further comprises a biocompatible particulate comprising a biologically active agent.
16. The method of claim 1 , wherein said polymer fibers further comprise a biologically active agent.
17. The method of claim 1 , wherein said particulate further comprises a biocompatible particulate comprising a microsphere or microcapsule.
18. The method of claim 1 , wherein said particulate further comprises a biocompatible particulate comprising a plurality of pores.
19. The method of claim 18 , wherein said fibers are arranged in such a manner so as to be at least partially interlaced within said pores of the biocompatible particulate.