Implantable prosthetic device

• US 4,955,907 A
• Filed: 03/20/1989
• Issued: 09/11/1990
• Est. Priority Date: 12/22/1987
• Status: Expired due to Term

• Current Assignee: Walter J. Ledergerber
• Original Assignee: Walter J. Ledergerber
• Inventors: Ledergerber, Walter J.
• Primary Examiner(s): Isabella, David J.
• Application Number:
  US07/325,881
• Time in Patent Office: 540 Days
• Field of Search: 623/11, 623/12, 623/7, 623/8, 128/155, 128/156
• US Class Current: 623/8
• 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: A61L 27/34 Macromolecular materials
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

An implant and coverings for an implant for use in the human body are disclosed. Coverings for implants are constructed to present a biocompatible surface to the body and to provide a textured surface which serves to disorganize scar tissue which forms around the implant. Filaments of expanded PTFEe are attached to a stretch fabric backing in a loose weave configuration. Silicone molded in geometric patterns may be employed to present a textured surface. Compressive structures may be beneficially used on the surface of the implant or in the interior of the implant. Foam is one such compressive structure. Hexagonally shaped compressive cells containing fluid, gas, gel or foam are adapted to receive an insert which contains an outer biocompatible coating. A valve or port is provided to communicate between the cell and the body. Expansions means may be provided to expand the implant in a desired direction.

Claims

1. A biocompatible textured covering for an implant for implanting into the body comprising,

a plurality of individual polygonal shaped PTFEe cups, each of said cups having a bottom surface and raised side walls,

said cups being disposed such that neighboring cups have adjacent side walls, and

a biocompatible material disposed on the bottom surface of the PTFEe cups whereby said material is capable of resisting the formation of spherical scar contracture about the implant.

2. The covering for an implant of claim 1 wherein the biocompatible material disposed on the bottom of the PTFEe cups includes a weave of PTFEe filaments.