Composite implants and methods of making and using the same
View Patent ↗The present invention provides composite implants for the replacement or augmentation of non-load bearing or load bearing soft tissues, and methods of making and using these implant compositions. In one embodiment, a composite implant of the present invention comprises a soft polymeric component coupled to a porous polymeric substrate.
1. A composite implant comprising:
a soft polymeric component;
a porous polymeric substrate; and
a non-porous barrier located at an interface between the soft polymeric component and the porous polymeric substrate,
wherein the soft polymeric component and the porous polymeric substrate are preformed with corresponding male and female coupling sites, each of the male coupling sites projecting outwardly from an outer surface of one of the soft polymeric component and the porous polymeric substrate and each of the female coupling sites being a recess located within the other of the soft polymeric component and the porous polymeric substrate,
wherein the soft polymeric component is mechanically coupled to the porous polymeric substrate through engagement of a plurality of the male and female coupling sites at the interface between the soft polymeric component and the porous polymeric substrate, and
wherein the male coupling sites pass through the non-porous barrier.
2. The implant of claim 1 , wherein the porous polymeric substrate comprises at least one porous polymeric layer.
3. The implant of claim 1 , wherein the porous polymeric substrate comprises a polyolefin, polyester, polyamide, polyketone, polacrylate, polymethylmethacrylate or polytetrafluoroethylene, or a combination thereof.
4. The implant of claim 3 , wherein the polyolefin comprises polyethylene, polypropylene, and/or a copolymer thereof.
5. The implant of claim 4 , wherein the polyethylene comprises high density polyethylene or ultrahigh molecular weight polyethylene.
6. The implant of claim 1 , wherein the porous polymeric substrate is sintered porous plastic and comprises a plurality of polymeric particles.
7. The implant of claim 1 , wherein the porous polymeric substrate has an average pore size ranging from about 1 um to about 1 mm and a porosity ranging from about 10% to about 90%.
8. The implant of claim 1 , wherein the porous polymeric substrate has a Shore D hardness greater than about 30.
9. The implant of claim 1 , wherein the porous polymeric substrate has a thickness ranging from about 0.2 mm to about 25 mm.
10. The implant of claim 1 , wherein the soft polymeric component comprises at least one polymeric layer.
11. The implant of claim 1 , wherein the soft polymeric component comprises polysiloxane, poly(vinyl alcohol), poly(vinyl alcohol) hydrogel, polytetrafluoroethylene, expanded-polytetrafluoroethylene or polyurethane, or a combination thereof.
12. The implant of claim 1 , wherein the soft polymeric component comprises poly(vinyl alcohol) or poly(vinyl alcohol) hydrogel having a molecular weight of from about 100,000 to about 500,000.
13. The implant of claim 1 , wherein the soft polymeric component comprises polysiloxane having a degree of polymerization of at least 1,000.
14. The implant of claim 1 , wherein the soft polymeric component has a Shore A hardness greater than about 20.
15. The implant of claim 1 , wherein the soft polymeric component has a tensile strength from about 3 MPa to about 10 MPa.
16. The implant of claim 1 , wherein the soft polymeric component is non-porous.
17. The implant of claim 1 , wherein the soft polymeric component is porous and has an average pore size ranging from about 1 um to about 1 mm and a porosity ranging from about 10% to about 90%.
18. The implant of claim 1 , wherein the soft polymeric component has a thickness ranging from about 0.2 mm to about 100 mm.
19. The implant of claim 1 , wherein the soft polymeric component is further coupled to the porous polymeric substrate through chemical means.
20. The implant of claim 1 , wherein the mechanical coupling is further through the pores of the porous polymeric substrate.
21. The implant of claim 19 , wherein the chemical means comprise an adhesive.
22. The implant of claim 21 , wherein the adhesive comprises a silicone.
23. The implant of claim 1 , wherein the implant is a craniofacial implant.
24. The implant of claim 23 , wherein the craniofacial implant is a chin implant, malar implant, eye implant, ear implant or nose implant.
25. The implant of claim 1 , wherein the soft polymeric component is non-porous and the porous polymeric substrate is sintered with an average pore size between 50 microns to 500 microns.
26. The implant of claim 1 , wherein each of the respective male and female coupling sites has substantially the same shape as each other respective male or female coupling site and substantially the same thickness as the respective component or substrate.
27. The implant of claim 1 , wherein the plurality of male coupling sites are metallic fasteners.