Mammary implant

• US 5,104,409 A
• Filed: 03/08/1991
• Issued: 04/14/1992
• Est. Priority Date: 01/10/1989
• Status: Expired due to Term

• Current Assignee: James L. Baker
• Original Assignee: James L. Baker
• Inventors: Baker, James L.
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): BRITTINGHAM, DEBRA
• Application Number:
  US07/666,642
• Time in Patent Office: 403 Days
• Field of Search: 623/7, 623/8, 623/11, 623/12, 623/66, 623/901
• US Class Current: 623/8
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants

Abstract

The mammary implant includes a shell with a base portion and a reinforcement member provided at the base portion. The shell also includes a promontory portion that projects from the base portion. The reinforcement member can be formed with materials of different hardnesses, or of different thicknesses in different areas. The reinforcement member can also be formed with ribs, rings or grooves at various areas of the reinforcement member to enhance flexibility or rigidity. The reinforced mammary implant prevents casular contracture due to scar tissue formation after implantation and thus maintains a desired profile and softness of the implanted prosthesis.

Claims

1. A method of making a mammary prosthesis comprising

a. forming a hollow, collapsible shell from a flexible, stretchable material and providing an opening of predetermined size in the wall of the shell,

b. inserting a resilient, nondeformable, substantially non-compressible reinforcement member of greater size than the opening of the shell into the shell,

c. joining the shell to the reinforcement member,

d. supplying a predetermined amount of cohesive filler material in the shell to project a portion of the shell from the reinforcement member, and

e. sealing the opening in the shell to confine the filler material therein.

2. The method of claim 1 wherein the step of sealing includes placement of a patch of shell material across the opening.

3. The method of claim 1 wherein the step of sealing includes placement of the reinforcement member across the area of the opening.

4. The method of claim 1 wherein the step of inserting includes stretching the shell in the area of the opening to permit accommodation of the reinforcement member in the shell.

5. A method of making a mammary prosthesis comprising

a. forming a hollow, collapsible shell from a flexible, stretchable material and providing an opening of predetermined size in the wall of the shell,

b. inserting a resilient, nondeformable, substantially non-compressible reinforcement member of greater size than the opening of the shell into the shell,

c. joining the shell to the reinforcement member,

d. supplying a predetermined amount of cohesive filler material in the shell to project a portion of the shell from the reinforcement member,

e. sealing the opening in the shell to confine the filler material therein, and wherein the step of inserting includes turning the shell inside out, and after the joining step, turning the shell outside in.

6. A method of making a mammary prosthesis comprising

a. forming a hollow, collapsible shell from a flexible, stretchable material and providing an opening of predetermined size in the wall of the shell,

b. forming a reinforcement member of resilient, nondeformable, substantially non-compressible material with a median portion that has a first level of flexibility and a peripheral portion that has a second level of flexibility greater than the first level of flexibility, and of greater size than the opening of the shell,

c. inserting the reinforcement member into the shell,

d. joining the shell to the reinforcement member,

e. supplying a predetermined amount of cohesive filler material in the shell to project a portion of the shell from the reinforcement member, and

f. sealing the opening in the shell to confine the filler material therein.

7. The method of claim 6 including forming the median portion of the reinforcement member to a first predetermined thickness and the peripheral portion to a second predetermined thickness that is less than the first predetermined thickness such that the peripheral portion is more flexible than the median portion.

8. The method of claim 6 including providing the reinforcement member with a predetermined minimum stiffness to enable the prosthesis to resist scar tissue contractures.

9. The method of claim 6 wherein the first and second levels of flexibility are obtained by forming the median portion with one predetermined harness and the peripheral portion with a second predetermined harness.

10. The method of claim 6 wherein the first and second levels of flexibility are obtained by forming at least one recess in the peripheral portion.

11. The method of claim 6 wherein the first and second levels of flexibility are obtained by forming the peripheral portion such that is tapers from the median portion.