ARTIFICIAL BREAST IMPLANT PROVIDED ON THE SURFACE THREOF WITH SILICON OPEN CELL FOAM LAYER AND METHOD FOR PRODUCING THE SAME

• US 20130302510A1
• Filed: 06/21/2013
• Published: 11/14/2013
• Est. Priority Date: 11/19/2009
• Status: Active Grant

• Current Assignee: Won Seok Yu
• Original Assignee: Won Seok Yu
• Inventors: YU, Won Seok
• Granted Patent: US 10,085,831 B2
• Time in Patent Office: Days
• US Class Current: 427/2.24
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: B29C 41/14 Dipping a core B29C41/10 takes precedence
• CPC Class Codes: B29C 44/005 Avoiding skin formation; Making foams with porous surfaces
• CPC Class Codes: B29C 67/202 comprising elimination of a solid or a liquid ingredient
• CPC Class Codes: B29K 2083/005 LSR, i.e. liquid silicone rubbers, or derivatives thereof
• CPC Class Codes: B29L 2031/7532 Artificial members, protheses

Abstract

Disclosed are an artificial breast implant in which the surface thereof is formed or modified with a silicone open cell (open pore) foam layer, and a method for producing the same. More specifically, disclosed are an artificial breast implant that has a surface including an open cell foam layer made of silicone and thus minimizes side effects such as in vivo rejection, which may occur after implantation of the implant into the body, in particular, the occurrence of capsular contracture to achieve superior biocompatibility and safety, and a method for producing the same.

Claims

1. (canceled)

2. (canceled)

3. A method for producing an artificial breast implant comprising:

dipping a breast-shaped mold in a silicone solution;

drying and curing the silicon solution adhered to the mold;

forming an open cell foam layer on an outer surface of the dried and cured silicon solution;

forming an aperture on a bottom of the dried and cured silicone solution, and removing the dried and cured silicone solution from the mold through the aperture, thereby obtaining an artificial breast shell; and

adhering a silicone film including a leakage prevention film to the aperture to seal the aperture,

wherein said forming the open cell foam layer includes;

(a) dipping the dried and cured silicone solution adhered to the mold in a second silicone solution, and taking it out to apply a silicone solution film on its outer surface;

(b) scattering or spraying solid particles or powder with an appropriate size to the surface of the applied silicone solution film such that the silicone solution film loses flowability;

(c) dipping or spraying an organic solvent on a resultant product of said step (b); and

(d) re-scattering or re-spraying solid particles or powder on a resultant product of said step (c).

5. The method according to claim 3, wherein the solid particles or powder is not dissolved in the silicone solution and does not affect physical properties of the silicone solution, and is dissolved in a solvent and removed.

6. The method according to claim 5, wherein the solid particles or powder is sodium chloride, ammonium carbonate, ammonium phosphate, or ammonium chloride.

7. The method according to claim 5, wherein the solvent is water.

8. The method according to claim 3, wherein the organic solvent is readily miscible with the silicone solution.

9. The method according to claim 8, wherein the organic solvent is benzene, toluene, xylene or a derivative thereof.

10. The method according to claim 9, wherein the organic solvent is xylene.

11. The method according to claim 3, wherein, in said forming the open cell foam layer, an open cell foam layer with a desired thickness is formed by controlling the concentration of silicone solution, the size of solid particles or powders, and or organic solvent treatment speed.

12. The method according to claim 3, wherein an open cell foam layer with a desired thickness is formed by repeating the formation of the open cell foam layer.

13. The method according to claim 3, wherein said forming of the open cell foam layer further includes:

removing nips to control the thickness of the formed open cell foam layer or to realize excellent appearance.

14. The method according to claim 3, wherein, in said forming the open cell foam layer, the treated solid particles or powder for formation of the open cell is removed by directly or indirectly treating the artificial breast shell provided with an open cell with water vapor.

15. The method according to claim 3, wherein said forming the open cell foam layer further includes:

drying and curing the formed open cell foam layer.

16. The method according to claim 15, wherein the drying is carried out by completely evaporating the organic solvent at 30°

C. in an oven and the curing is carried out by curing the silicone solution present on the dried artificial breast mold in an oven at 170°

C. for three hours.

17. The method according to claim 15, further comprising:

treating by rubbing the artificial breast shell including dried and cured open cell foam layer to remove the solid particles or powder.

18. The method according to claim 15, further comprising:

heating and high-pressure vapor treating the artificial breast shell provided with dried and cured open cell foam layer in the presence of 140°

C. water and 1.4 atm vapor, for about 30 hours, to remove the solid particles or powder.

4. (canceled)