Soft tissue augmentation apparatus

• US 5,607,477 A
• Filed: 01/27/1995
• Issued: 03/04/1997
• Est. Priority Date: 07/12/1993
• Status: Expired due to Fees

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Schindler, Robert, Maas, Corey
• Primary Examiner(s): Willse, David H.
• Application Number:
  US08/379,007
• Time in Patent Office: 767 Days
• Field of Search: 623/12, 623/9, 623/15, 606/213, 606/151, 606/108, 606/185
• US Class Current: 623/23.72
• CPC Class Codes: A61F 2/0059 Cosmetic or alloplastic implants A61F2/10 - A61F2/16, A61F2/28 take precedence

Abstract

A soft tissue augmentation kit comprises a flexible implant and an insertion tool for the implant. The implant is formed of a biocompatible material that is permeable to red blood cells and includes a cavity. The cavity opens to the exterior and permits fibrous tissue ingrowth. The insertion tool carries the implant via the cavity for insertion into selected soft tissue. When the insertion tool is removed the implant is left in the selected tissue.

Claims

1. A soft tissue augmentation kit comprising:

an implant, the implant consisting essentially of a non-degradable, biocompatible material and having exterior and interior surfaces, the interior surface defining a cavity longitudinally extending from at least one cavity end, at least a portion of the implant between the exterior and interior surfaces being permeable to fibrous tissue growth, the implant adapted to have textural compatibility with soft tissue when implanted while maintaining sufficient of the cavity for tissue ingrowth into the cavity adjacent to the at least one end; and

,

an insertion tool for the implant, the insertion tool including a shaft and terminating with a tool sharp tip, the tool being of a construction sufficient to carry the implant with the sharp tip extending beyond the implant through an incision made at least in part by the sharp tip and into a selected implant position in soft tissue.

2. The soft tissue augmentation kit as in claim 1 wherein a cross section of the implant has pores of about 10 to 50 microns, and the implant is sufficiently flexible as to flatten from overlying soft tissue when implanted.

3. The soft tissue augmentation kit as in claim 1 wherein at least a portion of the implant is formed of an expanded, fibrillated polytetrafluoroethylene.

4. The soft tissue augmentation kit as in claim 1 wherein said implant is carried via the cavity on the insertion tool shaft.

5. The soft tissue augmentation kit as in claim 1 wherein the implant is attached to the shaft such that the implant maybe inserted into the selected tissue.

6. The soft tissue augmentation kit as in claim 1 wherein a wall of the implant has pores of about 10 to 50 microns and at least a portion of the implant is formed of an expanded, fibrillated polytetrafluoroethylene.

7. The kit as in claim 6 having a plurality of implants.

8. The kit as in claim 6 where substantially the entire implant is formed of the expanded, fibrillated polytetrafluoroethylene.

9. The kit as in claims 1 wherein the implant material has sufficient porosity so as, together with the cavity, to permit tissue ingrowth and resultant implant anchoring after implantation.

10. The kit as in claim 1 wherein the implant is within a package of a structure sufficient to maintain a sterile condition until use.

11. The kit as in claim 1 wherein sufficient of the cavity is maintained for tissue ingrowth to substantially fill the cavity and thereby to anchor it.