Method And Apparatus For Attaching Soft Tissue To An Implant

• US 20090265014A1
• Filed: 03/05/2009
• Published: 10/22/2009
• Est. Priority Date: 04/22/2008
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: May, Brian M., Meridew, Jason D.
• Granted Patent: US 8,118,868 B2
• Time in Patent Office: Days
• US Class Current: 623/20.210
• CPC Class Codes: A61F 2/30739 Devices connected to the proximal part of an endoprosthetic femoral shaft for reinforcing or replacing the trochanters, e.g. the greater trochanter proximal parts of endoprosthetic femoral shafts A61F2/367; non-prosthetic trochanteric devices A61B17/74
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3836 Special connection between upper and lower leg, e.g. constrained
• CPC Class Codes: A61F 2002/30428 made by inserting a protrusion into a slot
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws

Abstract

A system and method for attaching soft tissue to a prosthetic implant can include a prosthetic component that defines a soft tissue attachment region having an attachment surface thereon. A first construct can be formed of porous metal and be removably coupled to the attachment surface. A second construct can be positioned outboard of the soft tissue. A fastener can be engaged to the second construct capturing the soft tissue against the first construct. The fastener can be coupled on a distal end to the first prosthetic component.

Claims

1. A system to attach a tissue portion to a prosthesis, comprising:

a proximal femoral prosthesis having a stem portion, a neck portion, and a tissue attachment region;

a first member separate from the proximal femoral prosthesis defining a first aperture, the first member having a first surface and a second surface, the first surface operable to selectively and removably engage the proximal femoral prosthesis and the second surface operable to engage a first side of the tissue portion;

a second member separate from the proximal femoral prosthesis defining a second aperture, the second member having a third surface and a fourth surface, the third surface operable to engage a second side of the tissue portion; and

a fastener separate from the proximal femoral prosthesis operable to interconnect the first member and the second member to fix the tissue portion and the second member to the proximal femoral prosthesis.

2. The system of claim 1 wherein the first member further includes a plurality of extension portions extending from the second surface operable to engage a first side of the tissue portion and operable to extend through at least a portion of the tissue portion.

3. The system of claim 2 wherein the second member defines notches, wherein the plurality of extension portions extend through the notches in a coupled position.

4. The system of claim 3 wherein the fastener has an external thread to threadably engage an internally threaded bore formed in the proximal femoral prosthesis in the coupled position.

5. The system of claim 3 wherein the proximal femoral prosthesis defines a smooth bore;

wherein the fastener has an external thread and is operable to pass through the smooth bore defined by the proximal femoral prosthesis and is operable to threadably engage a second fastener on a medial side of the proximal femoral prosthesis in the coupled position.

6. The system of claim 1 wherein the proximal femoral prosthesis defines a recess in the tissue attachment region;

wherein the first member is operable to be positioned in the recess and the second surface of the first member sits flush with the attachment surface in the coupled position.

7. The system of claim 1, wherein the first member includes a plurality of projections extending from the second surface;

wherein the second member defines a plurality of passages extending through the second member;

wherein the projections are operable to cooperate with the passages to couple the first member and the second member.

8. The system of claim 1, wherein the first member and the second member defines substantially complementary perimeters;

wherein the perimeter of the first member and the second member can be substantially circular, rectangular, square, trapezoidal, straight edged, or arcuate.

9. The system of claim 1, wherein the first member includes a raised wall extending substantially from the second surface of the first member;

wherein the raised wall is operable to cooperate with an exterior surface of the second member to engage the tissue portion.

10. The system of claim 9, wherein the raised wall is a broken wall including a gap between wall portions;

wherein the exterior surface of the second member defines notches operable to receive at least one of the raised wall portions of the first member.

11. The system of claim 1, wherein the second member defines an arcuate member terminating in a first end tip and a second end tip;

wherein the first end tip and the second end tip are both operable to engage a femur.

12. The system of claim 1, wherein at least one of the first member or the second member are formed of a completely porous material.

13. A system to attach a tissue portion to a prosthesis, comprising:

a femoral prosthesis having a tissue attachment region;

a first member separate from the femoral prosthesis having a first surface and a second surface and an aperture extending between the first surface and the second surface, the first member including a porous metal portion operable to contact the tissue portion;

a second member separate from the femoral prosthesis defining a second aperture, the second member having a third surface and a fourth surface, the third surface operable to engage a second side of the tissue portion; and

a fastener operable to hold the first member and the second member relative to each other and the tissue portion and to capture the tissue portion relative to the tissue attachment region.

14. The system of claim 13, wherein the first member defines a plurality of extension portions formed on the first surface of the first member and extend in a direction towards the tissue portion, wherein the first surface is formed of the porous metal and the second surface is formed of solid biocompatible metal.

15. The system of claim 13, wherein the third surface defines a plurality of extension portions and extend in a direction towards the tissue portion.

16. The system of claim 13, wherein the fastener has an external thread to threadably engage a threaded bore formed in the femoral prosthesis in a coupled position.

17. The system of claim 13, wherein the fastener passes through a smooth bore formed in the femoral prosthesis and threadably engages a second fastener on a medial side of the femoral prosthesis in a coupled position.

18. The system of claim 13, wherein the first member includes a plurality of projections extending from the first surface;

wherein the third surface of the second member defines a plurality of bores;

wherein the projections are operable to cooperate with the bores to couple the first member and the second member.

19. The system of claim 13, wherein the first member defines an arcuate member terminating in a first end tip and a second end tip;

wherein the first end tip and the second end tip are both operable to engage a femur.

20. The system of claim 13,

wherein at least one of the first member or the second member are formed entirely of a completely porous material.

21. A method for securing a tissue portion to a femoral prosthesis in an anatomy, the method comprising:

positioning the tissue portion between a first member at least partially formed of porous metal and defining a first aperture and the femoral prosthesis defining a first bore at a tissue portion attachment region;

advancing a fastener through the first aperture and the tissue portion;

positioning a second member defining a second bore between the tissue portion and the femoral prosthesis; and

further advancing the fastener into the first bore and the second bore such that the tissue portion is fixed between the first member and the second member near the femoral prosthesis.

22. The method of claim 21, further comprising:

coupling the first member and the second member;

wherein the tissue portion is captured between the coupled first member and the second member.

23. The method of claim 22, further comprising:

fixing the coupled first member and the second member to the femoral prosthesis;

removing the coupled first member and the second member from the femoral prosthesis; and

maintaining the coupling of the first member and the second member and fixing the removed coupled first member and the second member to a revision femoral prosthesis.

24. The method of claim 23, further comprising:

implanting the revision femoral prosthesis into a femur in the anatomy;

maintaining at least a portion of a bone ingrowth into either of the first member or the second member when fixing the removed coupled first member and the second member to a revision femoral prosthesis.

25. The method of claim 21, further comprising:

allowing bone ingrowth into at least one of the first member, the second member, or the tissue portion attachment region via a porous metal.

26. The method of claim 21, wherein positioning the tissue portion includes piercing the tissue portion with a piercing member extending from the soft tissue attachment region.

27. The method of claim 26, wherein the piercing member extends at an angle from the soft tissue attachment region that is generally away from an originating point of the tissue portion;

wherein the tissue portion has an originating point in the anatomy.

28. The method of claim 21, further comprising:

positioning the second member within a recessed portion formed in the femoral prosthesis.