Seamless breast prosthesis

• US 6,074,421 A
• Filed: 04/03/1998
• Issued: 06/13/2000
• Est. Priority Date: 04/05/1997
• Status: Expired due to Term

• Current Assignee: Medisyn Technologies Limited (Abbvie Incorporated)
• Original Assignee: Medisyn Technology, Ltd.
• Inventors: Murphy, Murtagh
• Primary Examiner(s): Willse, David H.
• Assistant Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US09/055,045
• Time in Patent Office: 802 Days
• Field of Search: 623/7, 623/8, 264/222
• US Class Current: 623/8
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: B26D 3/02 Bevelling

Abstract

An improved breast prosthesis or mammary implant (20), is provided of a type known per se, comprising a single or multiple lumen elastic shell or envelope (23), for example of molded silicone, in which an aperture formed in the shell for removal from a mold is subsequently sealed with a silicone patch (24), thus forming internal lumen(s) which can then be filled by either the manufacturer or the surgeon with a fluid or gel. A substantially seamless join between the patch and the shell is formed by means of an aperture with a chamfered edge (22), and applying and bonding a patch to one side, preferably the inside, of the shell such that a seamless and ridgeless join between the patch and the shell is formed to the exterior. A method and apparatus for performing a chamfer trimming operation and applying the patch are also disclosed. A double chamfer aperture edge construction filled in with an overlay patch and an underlay patch is also disclosed.

Claims

1. A breast prosthesis comprising a shell of elastic material having an outer surface, an inner surface and an aperture therein for the purpose of removing the shell from a mold, and which aperture is sealed by means of a patch thereby forming internal lumen which can be filled with a fluid or gel, wherein said aperture has a chamfered edge.

2. A breast prosthesis according to claim 1 wherein the chamfered edge of the aperture tapers outwardly toward said outer surface of the shell.

3. A breast prosthesis according to claim 1 wherein the chamfered edge of the aperture tapers outwardly toward said inner surface of the shell.

4. A breast prosthesis according to claim 3, wherein a annular recess is formed in the shell surrounding the aperture, for reception of an overlapping portion of the patch, such that a ridgeless joint is formed between the patch and said outer surface of the shell.

5. A breast prosthesis according to claim 1, in which a double chamfer is formed around the aperture edge, tapering outwardly toward said outer surface and said inner surface of said shell and wherein an overlay patch no larger than the aperture and an underlay patch larger than the aperture fill the aperture.

6. A breast prosthesis according to claim 1 wherein said shell has a thickness and wherein the patch is of substantially the same thickness as the shell and has a larger diameter than the aperture.

7. A breast prosthesis according to claim 1, in which the patch is of substantially the same size as the aperture and has a chamfered edge matingly corresponding to the chamfer formed on the aperture.