Apparatus for soft tissue attachment

• US 7,500,983 B1
• Filed: 06/09/2004
• Issued: 03/10/2009
• Est. Priority Date: 06/09/2004
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Sports Medicine LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Stone, Kevin T, Walters, Troy M, Kaiser, Ryan A
• Primary Examiner(s): Manahan; Todd E
• Assistant Examiner(s): SEVERSON, RYAN J
• Application Number:
  US10/864,900
• Time in Patent Office: 1,735 Days
• Field of Search: 623/13.14, 623/13.12, 623/13.11, 606/62, 606/72, 606/80, 606/64, 606/86, 606/88, 606/151, 606/219, 606/232, 244/99
• US Class Current: 606/232
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors
• CPC Class Codes: A61B 2017/0414 having a suture-receiving opening, e.g. lateral opening
• CPC Class Codes: A61B 2017/0459 Multiple holes in the anchor through which the suture extends and locking the suture when tension is applied
• CPC Class Codes: A61F 2/0811 Fixation devices for tendons or ligaments
• CPC Class Codes: A61F 2002/0829 without deformation of anchor parts, e.g. fixation screws on bone surface, extending barbs, cams, butterflies, spring-loaded pins
• CPC Class Codes: A61F 2002/0852 Fixation of a loop or U-turn, e.g. eyelets, anchor having multiple holes
• CPC Class Codes: A61F 2002/0882 Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone

Abstract

An apparatus and method for fixing a selected graft relative to a selected anatomical portion. An anchor may be provided that may be interconnected with a selected graft portion that is operable to pass through a selected bore and then moved into an operable position to engage a selected portion of the bore to substantially eliminate the possibility of the graft moving in an unselected direction through the bore. In addition, a spacer member may be used to expand a selected portion of the graft to reduce localized stress and may increase ingrowth into a selected bony portion.

Claims

1. An anchor member to selectively anchor a graft relative to a selected portion of an anatomy, comprising:

a lever arm extending along a first axis between a first end and a second end;

a connection region extending from said lever arm, the connection region having a first transverse bore and a second transverse bore spaced apart from the first bore, said first transverse bore having a first longitudinal axis that extends across said connection region and said second transverse bore having a second longitudinal axis that extends across said connection region and is different from said first longitudinal axis, said first and second longitudinal axes defining a first plane;

an activation region defined by said lever arm;

a first flexible member connected to said activation region;

a second flexible member extending from said connection region, the second flexible member is received in the first bore and the second bore; and

a first extending portion of said second flexible member and a second extending portion of said second flexible member that are biased in a relaxed first position to retain said lever arm in an activated position to selectively hold the graft relative to the selected portion of the anatomy, said first extending portion and said second extending portion are moved to a stressed second position when said lever arm is in a non-activated position, said first extending portion and said second extending portion defining a second plane that is non-coplanar with the first plane when said lever arm is in the activated position, and said second plane is not perpendicular to said first plane when said anchor is in the non-activated position.

2. The anchor member of claim 1, wherein said first flexible member operatively moves said lever arm from the activated to the non-activated position.

3. The anchor member of claim 1, wherein said lever arm is movable through a bore defined by the selected portion of the anatomy in the non-activated position and said lever arm is substantially immovable through the bore defined by the selected portion of the anatomy in the activated position.

4. The anchor member of claim 1, wherein said first axis of said lever arm generally defines a straight line, an arc, and combinations thereof.

5. The anchor member of claim 1, wherein said second flexible member includes at least one of a strand, a wire, a shape memory material, and a suture.

6. The anchor member of claim 1, wherein said second flexible member interconnects the graft with the lever arm.

7. The anchor member of claim 1, further comprising a spacer member operably interconnected with said lever arm.

8. The anchor member of claim 7, wherein said second flexible member substantially interconnects said spacer member and said lever arm.

9. The anchor member of claim 7, wherein said spacer member is operable to substantially separate a first portion of the graft from a second portion of the graft.

10. The anchor member of claim 7, wherein said spacer member includes a cross-section substantially defined by a cruciform, a circle, an ellipsoid, a square, or combinations thereof.

11. A soft tissue connection assembly operable to hold a soft tissue graft near a select portion of an anatomy, comprising:

an anchor member including;

a lever arm; and

an engaging portion extending from said lever arm, said engaging portion defining a first bore and a second bore, said lever arm and said engaging portion are substantially formed as a single piece;

a connecting strand portion including a first extending portion that transitions to a curved portion, a second extending portion that transitions to said curved portion, a first flange that is received in the first bore, and a second flange that is received in the second bore, said connecting strand portion does not form a closed loop, the curved portion and the first and second flanges are located on opposite ends of the first extending portion and the second extending portion, and said connecting strand portion is capable of operatively interconnecting the soft tissue with said anchor member, said first extending portion and said second extending portion defining a first plane, said first flange and said second flange defining a second plane, wherein the first plane and the second plane are non-coplanar when said connecting strand portion is substantially relaxed; and

a spacer member spaced apart from said connecting strand portion and connected to said connecting strand portion with a flexible member.

12. The soft tissue connection assembly of claim 11, wherein said spacer member includes an exterior dimension substantially equivalent to an interior dimension of a bore formed in the selected portion of the anatomy;

wherein said spacer member engages at least a portion of the selected portion of the anatomy.

13. The soft tissue connection assembly of claim 11, wherein said spacer member includes a geometry operable to position the soft tissue graft adjacent the selected portion of the anatomy after implantation of the soft tissue into the selected portion of the anatomy.

14. The soft tissue connection assembly of claim 11, wherein said spacer member reduces a local force produced on the soft tissue graft after the soft tissue graft is interconnected with said engaging portion.

15. The soft tissue connection assembly of claim 11, wherein said spacer member includes a cross-section operable to separate a first portion of a graft from a second portion of a graft.

16. The soft tissue connection assembly of claim 11, further comprising:

a shape memory material extending from said engaging portion;

wherein moving the lever arm between an activated position and an unactivated position moves said shaped memory material from a first position to a second position.

17. The soft tissue connection assembly of claim 16, wherein said shape memory material includes a first position substantially operable to hold the graft in a selected position relative to the anatomy when said lever arm is in said activated position.

18. The soft tissue connection assembly of claim 11, wherein said spacer member substantially directly engages the graft to hold the graft relative to said anchor member.

19. The soft tissue connection assembly of claim 11, wherein said engaging portion substantially defines a fulcrum about which said lever arm may rotate.

20. The soft tissue connection assembly of claim 11, wherein said engaging portion substantially engages a substantially shape memory material operable to hold a selected graft relative to the lever arm.

21. The soft tissue connection assembly of claim 20, wherein said shape memory material may include a metal, a plastic, a filament, a suture, or combinations thereof.

22. The soft tissue connection assembly of claim 11, wherein said spacer is operable to separate one portion of the graft from another portion of the graft during implantation.

23. The soft tissue connection assembly of claim 11, wherein said spacer includes a cross-section substantially defined by at least one of a cruciform, a circle, a square, or combinations thereof.

24. The soft tissue connection assembly of claim 11, wherein said spacer member substantially defines a bore substantially transverse to a longitudinal axis of the spacer member such that the graft may pass through the spacer member.

25. The soft tissue connection assembly of claim 11, wherein said spacer member includes a plurality of ridges that separate a first portion of the graft from a second portion of the graft.

26. The soft tissue connection assembly of claim 11, wherein said connecting strand portion includes a shape memory material.

27. The soft tissue connection assembly of claim 26, wherein said first extending portion and said second extending portion are biased in a relaxed first position to retain said anchor in an activated position, said first extending portion and said second extending portion are moved to a stressed second position when said anchor is in a non-activated position;

wherein said first extending portion and said second extending portion are at least approximately perpendicular to said anchor when said anchor is in the activated position; and

wherein said first extending portion and said second extending portion are not perpendicular to said anchor when said anchor is in the non-activated position.

28. A soft tissue connection assembly operable to hold a soft tissue graft near a select portion of an anatomy, comprising:

an anchor member;

a first bore extending through said anchor member;

a second bore extending through said anchor member;

a connecting strand portion that is capable of operatively interconnecting the soft tissue with said anchor member, said connecting strand portion includes a first flange that is seated within said first bore, a second flange that is seated within said second bore, a first elongated portion that extends from said first flange, a second elongated portion that extends from said second flange, and a curved portion that connects said first elongated portion to said second elongated portion, said first extending portion and said second extending portion defining a first plane, said first flange and said second flange defining a second plane, wherein the first plane and the second plane are non-coplanar when said connecting strand portion is substantially relaxed; and

a spacer member spaced apart from and connected to said connecting strand portion with a flexible member, said spacer member includes a cross-section substantially defined by at least one of a cruciform, a circle, and a square.

29. The soft tissue connection assembly of claim 28, wherein said spacer member includes an exterior dimension substantially equivalent to an interior dimension of a bore formed in the selected portion of the anatomy;

wherein said spacer member engages at least a portion of the selected portion of the anatomy.

30. The soft tissue connection assembly of claim 28, wherein said spacer member includes a geometry operable to position the soft tissue graft adjacent the selected portion of the anatomy after implantation of the soft tissue into the selected portion of the anatomy.

31. The soft tissue connection assembly of claim 28, wherein said spacer member reduces a local force produced on the soft tissue graft after the soft tissue graft is interconnected with said connecting strand portion.

32. The soft tissue connection assembly of claim 28, wherein said spacer member is operable to separate a first portion of a graft from a second portion of a graft.

33. The soft tissue connection assembly of claim 28, wherein the connecting strand portion includes a shape memory material;

wherein moving the lever arm between an activated position and an unactivated position moves said shape-memory material from a first position to a second position.

34. The soft tissue connection assembly of claim 28, wherein said connecting strand portion includes a shape memory material that includes at least one of a metal, a plastic, a filament, and a suture.

35. The soft tissue connection assembly of claim 28, wherein said spacer member substantially defines a bore substantially transverse to a longitudinal axis of the spacer member such that the graft may pass through the spacer member.

36. The soft tissue connection assembly of claim 28, wherein said anchor member is movable through a bore defined by the selected portion of the anatomy in a non-activated position and the anchor member is not movable through the bore when said anchor member is in an activated position.

37. The soft tissue connection assembly of claim 28, wherein said connecting strand portion includes a shaped memory material having a relaxed position when said anchor member is in an activated position and a stressed position when said anchor member is in a non-activated position.

38. The soft tissue connection assembly of claim 28, wherein said spacer member includes a plurality of ridges that separate a first portion of the graft from a second portion of the graft.

39. The soft tissue connection assembly of claim 28, wherein said first elongated portion and said second elongated portion are biased in a relaxed first position to retain said anchor in an activated position, said first elongated portion and said second elongated portion are moved to a stressed second position when said anchor is in a non-activated position;

wherein said first elongated portion and said second elongated portion are at least approximately perpendicular to said anchor when said anchor is in the activated position; and

wherein said first elongated portion and said second elongated portion are not perpendicular to said anchor member when said anchor member is in the non-activated position.

40. A soft tissue connection assembly operable to hold a soft tissue graft near a select portion of an anatomy, comprising:

an anchor member;

a first bore extending through said anchor member;

a second bore extending through said anchor member;

an activation bore extending through said anchor member, said activation bore having a longitudinal axis that is substantially perpendicular to a longitudinal axis of the first bore and a longitudinal axis of the second bore;

a flexible member extending through the activation bore; and

a connecting strand portion including a shape memory material, said connecting strand portion operatively interconnecting the soft tissue with said anchor member, said connecting strand portion includes a first flange that is seated within said first bore, a second flange that is seated within said second bore, a first elongated portion that extends from said first flange, a second elongated portion that extends from said second flange, and a curved portion that connects said first elongated portion to said second elongated portion, said first extending portion and said second extending portion defining a first plane, said first flange and said second flange defining a second plane, wherein the first plane and the second plane are non-coplanar when said connecting strand portion is unstressed.

41. The soft tissue connection assembly of claim 40, wherein said shape memory material includes at least one of a metal, a plastic, a filament, and a suture.

42. The soft tissue connection assembly of claim 40, further comprising a spacer member connected to said anchor member.

43. The soft tissue connection assembly of claim 42, wherein said spacer member includes a cross-section substantially defined by at least one of a cruciform, a circle, a square, or combinations thereof.

44. The soft tissue connection assembly of claim 42, wherein said spacer member is connected to said anchor member with a connection device that is independent of the soft tissue.

45. The soft tissue connection assembly of claim 40, wherein moving said anchor member between an activated position and an unactivated position moves said shape-memory material from a first position to a second position.

46. The soft tissue connection assembly of claim 40 wherein said shape memory material is in a relaxed position when the anchor member is in an activated position and a stressed position when said anchor member is in a non-activated position.

47. The soft tissue connection assembly of claim 40, wherein said first elongated portion and said second elongated portion are biased in a relaxed first position to retain said anchor in an activated position, said first elongated portion and said second elongated portion are moved to a stressed second position when said anchor is in a non-activated position;

wherein said first elongated portion and said second elongated portion are at least approximately perpendicular to said anchor when said anchor is in the activated position; and

wherein said first elongated portion and said second elongated portion are not perpendicular to said anchor member when said anchor member is in the non-activated position.