Medical implant having bioabsorbable textured surface

• US 20030036803A1
• Filed: 08/14/2001
• Published: 02/20/2003
• Est. Priority Date: 08/14/2001
• Status: Active Grant

• Current Assignee: Whd Electronische Prueftechnik
• Original Assignee: Jim J. Mcghan
• Inventors: McGhan, Jim J.
• Granted Patent: US 6,913,626 B2
• Time in Patent Office: Days
• US Class Current: 623/23.71
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61F 2002/0086 for preferentially controlling or promoting the growth of specific types of cells or tissues of bone tissue onto implantable joints A61F2002/3093

Abstract

A hybrid medical implant having a biocompatible, nonabsorbable core portion and a bioabsorbable textured outer surface portion overlying the core portion. The hybrid implant is useful as a prosthesis for tissue augmentation and/or reconstruction. The core portion of the implant includes a body formed from a nonabsorbable, biocompatible implantable material such as silicone or urethane elastomer. The core portion may be either a solid body, a viscous gel body or a fluid-filled shell. The textured outer surface portion envelops the core portion and presents an irregular, bioabsorbable textured surface to the exterior environment. As a capsule forms around the implant following implantation, the irregular contour of the outer surface of the implant disorients structural proteins in the capsule to impede spherical contraction thereof. Either during the formation of the capsule and/or after the capsule is formed, the outer bioabsorbable surface portion of the implant is absorbed by the body of the host. After bioabsorbtion of the bioabsorbable outer surface portion, the remaining core portion of the implant remains enveloped by the capsule but unattached to capsular tissue. The outer bioabsorbable portion of the hybrid implant may include more than one biocompatible, bioabsorbable material.

Claims

1. A hybrid medical implant comprising an elastomeric, nonbioabsorbable core portion having an outer surface and a bioabsorbable portion affixed to said outer surface of said core portion.

2. A hybrid medical implant in accordance with claim 1 wherein said hybrid medical implant has an outer surface and wherein said outer surface of said hybrid medical implant has an irregular topography.

3. The hybrid medical implant of claim 1 wherein said core portion comprises a fluid-filled elastomeric shell.

4. The hybrid medical implant of claim 2 wherein said core portion comprises a fluid-filled elastomeric shell.

5. The hybrid medical implant of claim 1 wherein said core portion comprises a solid elastomeric body.

6. The hybrid medical implant of claim 2 wherein said core portion comprises a solid elastomeric body.

7. The hybrid medical implant of claim 1 wherein said elastomeric core portion comprises silicone.

8. The hybrid medical implant of claim 2 wherein said elastomeric core portion comprises silicone.

9. The hybrid medical implant of claim 3 wherein said elastomeric shell comprises silicone.

10. A hybrid medical implant comprising an elastomeric, nonbioabsorbable core portion having an outer surface and a bioabsorbable portion affixed to said outer surface of said core portion wherein said bioabsorbable portion comprises a bioabsorbable material selected from the group consisting of collagen, chitin, chitosan, polymers or copolymers of lactide, glycolide, caprolactone, polydioxanone, trimethylene carbonate, polyorthoesters and polyethylene oxide.

11. A hybrid medical implant comprising an elastomeric, nonbioabsorbable core portion having an outer surface and a bioabsorbable portion affixed to said outer surface of said core portion wherein said bioabsorbable portion comprises an antibiotic.

12. A hybrid medical implant in accordance with claim 11 wherein said antibiotic is disposed between said core portion and said bioabsorbable portion of said implant.

13. A hybrid medical implant comprising an elastomeric, nonbioabsorbable core portion having an outer surface and a bioabsorbable portion affixed to said outer surface of said core portion wherein said bioabsorbable portion comprises a plurality of bioabsorbable materials.