Method And Apparatus For Soft Tissue Fixation To Bone

• US 20100331881A1
• Filed: 06/24/2009
• Published: 12/30/2010
• Est. Priority Date: 06/24/2009
• Status: Active Grant

• Current Assignee: Karl Storz Se & Co. Kg
• Original Assignee: Karl Storz Se & Co. Kg
• Inventors: Hart, Rickey
• Granted Patent: US 8,906,060 B2
• Time in Patent Office: Days
• 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 for applying suture clamps, clips or locks A61B2017/0488
• CPC Class Codes: A61B 2017/0414 having a suture-receiving opening, e.g. lateral opening lateral eyelet for attaching suture to needle A61B2017/06019
• CPC Class Codes: A61B 2017/0432 the separate member staying in the anchor after placement

Abstract

A bone anchor having a rivet having a proximal end and a head distal to an elongate body, a sleeve having an internal channel for slidably receiving the body, and an expansion nut having a channel therethrough for slidably receiving said body, proximal of said sleeve is provided. The sleeve further has a shoulder provided within the internal channel in the region of the proximal end for engaging the expansion nut. The rivet, sleeve and expansion nut are arranged such that movement of the rivet from a first position to a second position causes the sleeve to cam over the rivet head and expansion nut until said expansion nut engages said shoulder, forcing the sleeve to expand into a wall of a bone hole.

Claims

1. A bone anchor comprising:

a rivet having a proximal end and a head distal to an elongate body;

a sleeve having an internal channel for slidably receiving the body; and

an expansion nut having a channel therethrough for slidably receiving said body, proximal of said sleeve;

said sleeve having a shoulder provided within the internal channel in the region of the proximal end for engaging said expansion nut;

the rivet, sleeve and expansion nut being so arranged such that movement of the rivet from a first position to a second position causes the sleeve to cam over the rivet head and expansion nut until said expansion nut engages said shoulder, forcing the sleeve to expand into a wall of a bone hole.

2. The bone anchor of claim 1 wherein said sleeve further comprises a plurality of axial slits in communication with the internal channel of the sleeve, said plurality of axial slits defining a plurality of flexible wall sections.

3. The bone anchor of claim 2 wherein said plurality of axial slits comprises at least one axial slit at a proximal end, at least one axial slit at a distal end of said sleeve

4. The bone anchor of claim 2 wherein said plurality of axial slits comprises at least two axial slits at said proximal end and at least two axial slits at said distal end.

5. The bone anchor of claim 1 wherein the inner surface of said sleeve further comprises a distal camming surface for mating with said rivet head and a proximal camming surface for mating with said expansion nut, said proximal camming surface terminating in said shoulder.

6. The bone anchor of claim 5 wherein said sleeve distal camming surface is arranged to telescope over the rivet head and the sleeve proximal camming surface is arranged to telescope over the expansion nut so that when the rivet is moved from a first position to a second position, said plurality of flexible wall sections of said sleeve expand into a wall of a bone hole.

7. The bone anchor of claim 1 wherein said expansion nut has a proximal end and a distal end and wherein said distal end is tapered.

8. The bone anchor of claim 6 wherein said proximal camming surface tapers inwards toward the distal end of said sleeve.

9. The bone anchor of claim 6 wherein said distal camming surface tapers inwards toward the proximal end of said sleeve.

10. The bone anchor of claim 1 wherein said body further comprises an eyelet for accommodating a suture.

11. The bone anchor of claim 1 wherein said bone anchor is made from a bioabsorbable material.

12. A bone anchor comprising:

a rivet having a proximal end and a head distal to an elongate body;

a hollow sleeve, having at least one axial slit at a proximal end, at least one axial slit at a distal end, and an inner surface;

said body at least partially slidably received within said sleeve proximal of said head; and

an expansion nut slidably received on said body, proximal of said sleeve;

said sleeve having a shoulder provided on the inner surface in the region of the proximal end for engaging said expansion nut.

13. The bone anchor of claim 12 wherein said expansion nut has a proximal end and a distal end and wherein said distal end is tapered.

14. The bone anchor of claim 12 wherein the inner surface of said sleeve further comprises a distal camming surface for mating with said rivet head and a proximal camming surface for mating with said expansion nut, said proximal camming surface terminating in said shoulder.

15. The bone anchor of claim 14 wherein said proximal camming surface tapers inwards toward the distal end of said sleeve.

16. The bone anchor of claim 14 wherein said distal camming surface tapers inwards toward the proximal end of said sleeve.

17. The bone anchor of claim 12 wherein said body further comprises an eyelet for accommodating a suture.

18. The bone anchor of claim 12 wherein said bone anchor is made from a bioabsorbable material.

19. The bone anchor of claim 12 wherein said sleeve comprises at least two axial slits at said proximal end and at least two axial slits at said distal end.

20. A method for securing a bone anchor in a bone tunnel comprising the steps of:

providing a tunnel in a bone;

placing a bone anchor in said tunnel, the bone anchor having;

a rivet having a proximal end and a head distal to an elongate body;

a hollow sleeve adapted to receive said body, having a proximal end, a distal end, and an inner surface; and

an expansion nut slidably received on said body, proximal of said sleeve;

said sleeve further having at least one axial slit at said proximal end, at least one axial slit at said distal end, and a shoulder provided on the inner surface in the region of the proximal end for engaging said expansion nut;

moving either the rivet in a proximal direction or the expansion nut in a distal direction so that the sleeve cams over the rivet head and expansion nut until said expansion nut rests on the distal side of said shoulder and causes said sleeve to expand into said bone tunnel at said at least one axial slit at the proximal end and said at least one axial slit at the distal end.

21. The method of claim 20 wherein said expansion nut has a proximal end and a distal end and wherein said distal end is tapered.

22. The method of claim 20 wherein the inner surface of said sleeve further comprises a distal camming surface for mating with said rivet head and a proximal camming surface for mating with said expansion nut, said proximal camming surface terminating in said shoulder.

23. The method of claim 22 wherein said proximal camming surface tapers inwards toward the distal end of said sleeve.

24. The method of claim 22 wherein said distal camming surface tapers inwards toward the proximal end of said sleeve.

25. The method of claim 20 wherein said body further comprises an eyelet for accommodating a suture.

26. The method of claim 20 wherein said bone anchor is made from a bioabsorbable material.

27. The method of claim 20 wherein said sleeve comprises at least two axial slits at said proximal end and at least two axial slits at said distal end.

28. A bone anchor comprising:

a rivet having a proximal end and a head distal to an elongate body;

a sleeve having an internal channel for slidably receiving the body; and

an expansion nut having a channel therethrough for slidably receiving said body;

said sleeve further having a shoulder provided within the internal channel in the region of the proximal end for engaging said expansion nut;

the sleeve being disposed proximally of the rivet head and the expansion nut being disposed distally of the sleeve along the body such that movement of the rivet from a first position to a second position causes the sleeve to cam over the rivet head and expansion nut until said expansion nut engages said shoulder, forcing the sleeve to expand into a wall of a bone hole.

29. The bone anchor of claim 28 wherein said sleeve further comprises a plurality of axial slits in communication with the internal channel of the sleeve, said plurality of axial slits defining a plurality of flexible wall sections.

30. The bone anchor of claim 29 wherein said plurality of axial slits comprises at least one axial slit at a proximal end, at least one axial slit at a distal end of said sleeve

31. The bone anchor of claim 29 wherein said plurality of axial slits comprises at least two axial slits at said proximal end and at least two axial slits at said distal end.

32. The bone anchor of claim 28 wherein the inner surface of said sleeve further comprises a distal camming surface for mating with said rivet head and a proximal camming surface for mating with said expansion nut, said proximal camming surface terminating in said shoulder.

33. The bone anchor of claim 32 wherein said sleeve distal camming surface is arranged to telescope over the rivet head and the sleeve proximal camming surface is arranged to telescope over the expansion nut so that when the rivet is moved from a first position to a second position, said plurality of flexible wall sections of said sleeve expand into a wall of a bone hole.

34. The bone anchor of claim 28 wherein said expansion nut has a proximal end and a distal end and wherein said distal end is tapered.

35. The bone anchor of claim 34 wherein said proximal camming surface tapers inwards toward the distal end of said sleeve.

36. The bone anchor of claim 34 wherein said distal camming surface tapers inwards toward the proximal end of said sleeve.

37. The bone anchor of claim 28 wherein said body further comprises an eyelet for accommodating a suture.

38. The bone anchor of claim 28 wherein said bone anchor is made from a bioabsorbable material.

39. A bone anchor comprising:

a rivet having a proximal end and a head distal to an elongate body having two elongate grooves;

a hollow sleeve, having at least one axial slit at a proximal end, at least one axial slit at a distal end, and an inner surface;

said body at least partially slidably received within said sleeve proximal of said head; and

an expansion nut slidably received on said body, proximal of said sleeve;

said head further having a slot for accommodating a suture.

40. The bone anchor of claim 39 wherein said two elongate grooves are in line with said slot.

41. The bone anchor of claim 39 wherein said expansion nut has a proximal end and a distal end and wherein said distal end is tapered.

42. The bone anchor of claim 39 wherein the inner surface of said sleeve further comprises a distal camming surface for mating with said rivet head and a proximal camming surface for mating with said expansion nut, said proximal camming surface terminating in said shoulder.

43. The bone anchor of claim 42 wherein said proximal camming surface tapers inwards toward the distal end of said sleeve.

44. The bone anchor of claim 42 wherein said distal camming surface tapers inwards toward the proximal end of said sleeve.

45. The bone anchor of claim 39 wherein said sleeve further comprises a shoulder provided on the inner surface in the region of the proximal end for engaging said expansion nut.

46. The bone anchor of claim 39 wherein said sleeve comprises at least two axial slits at said proximal end and at least two axial slits at said distal end.