Multi-layered implant

• US 5,686,090 A
• Filed: 12/11/1995
• Issued: 11/11/1997
• Est. Priority Date: 01/28/1993
• Status: Expired due to Term

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Dahlke, Hermann, Schilder, Lothar
• Primary Examiner(s): Kishore, Gollamudi S.
• Application Number:
  US08/570,272
• Time in Patent Office: 701 Days
• Field of Search: 424/422-427, 424/435, 424/473, 604/378
• US Class Current: 424/423
• CPC Class Codes: A61C 8/0006 Periodontal tissue or bone regeneration support means for endoprosthetic bone substitute or bone graft implants A61F2/2846
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/02 Prostheses implantable into the body closure means for urethra or rectum or for artificial body openings therefor A61F2/0004
• CPC Class Codes: A61F 2002/0068 having a special mesh pattern
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: A61F 2250/003 differing in adsorbability or resorbability, i.e. in adsorption or resorption time
• CPC Class Codes: A61F 2250/0051 differing in tissue ingrowth capacity, e.g. made from both ingrowth-promoting and ingrowth-preventing parts
• CPC Class Codes: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/146 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence

Abstract

A multi-layered implant has at least two layers, of which at least two have a different porosity. A woven or knitted mesh, e.g., can be provided completely or partly with a porous fleece layer on one side or on both sides. The porosity can vary within a fleece layer. A layer of the multi-layered implant can also consist of a film. Resorbable and non-resorbable substances are considered as materials.

Claims

1. A surgical implant, consisting of:

a woven mesh having a top side and a bottom side; and

a porous fleece layer mounted to the top side of the mesh wherein said fleece has a porosity in the range of about 100 to about 1,000 liters/(m² s) gas low measured at an inlet pressure of 200 PA, a test surface of 50 cm² and a test thickness of 1 mm,

wherein the woven mesh and porous fleece layer are made of a resorbable polymer selected from the group consisting of Polyglactin 910, Polydioxanone, Poliglecaprone 25 and combinations thereof.

2. The implant of claim 1, wherein the fleece layer has a first zone having a porosity of 1000 l/m² s and a second adjacent peripheral zone having a porosity of 200 l/m² s.