Suture anchor with insert-molded rigid member

• US 9,549,726 B2
• Filed: 08/27/2014
• Issued: 01/24/2017
• Est. Priority Date: 02/02/1999
• Status: Expired due to Fees

• Current Assignee: Arthrex Incorporated
• Original Assignee: Arthrex Incorporated
• Inventors: Dreyfuss, Peter J., Benavitz, William C.
• Primary Examiner(s): Dornbusch, Dianne
• Application Number:
  US14/469,733
• Publication Number:
  US 20140364909A1
• Time in Patent Office: 881 Days
• US Class Current: 1/1
• 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 17/06166 Sutures suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M
• CPC Class Codes: A61B 17/8645 Headless screws, e.g. ligament interference screws
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors for applying suture clamps, clips or locks A61B2017/0488
• CPC Class Codes: A61B 2017/0412 having anchoring barbs or pins extending outwardly from suture anchor body
• 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 2017/0427 having anchoring barbs or pins extending outwardly from the anchor body
• CPC Class Codes: A61B 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61B 2017/0441 the shaft being a rigid coil or spiral
• CPC Class Codes: A61B 2017/0445 cannulated, e.g. with a longitudinal through-hole for passage of an instrument
• CPC Class Codes: A61B 2017/0618 elastic, e.g. stretchable for prostheses A61F2210/0057

Abstract

A threaded suture anchor with an eyelet shield transversely molded at a distal end of the anchor body, over which one or more strands of suture is looped. The anchor body is threaded and has a tapered distal portion. The proximal end portion of the suture anchor body has a polygonally shaped opening to accept a polygonal drive head, preferably hexagonal or square. The peripheral surface defining polygonally shaped opening is rounded and smooth to prevent abrading sutures placed in contact therewith. In another embodiment, a push-in anchor is provided with an eyelet shield at the proximal end of the anchor.

Claims

1. A suture anchor assembly comprising:

an anchor body including a longitudinal axis, an exterior surface, a proximal end, and a distal end, the anchor body including a first opening at the proximal end of the anchor body, the anchor body including an internal passage extending along the longitudinal axis from the first opening through at least a portion of a length of the anchor body, the anchor body including an external helical thread on the exterior surface, the external helical thread extending along the anchor body, wherein the external helical thread extends from the proximal end of the anchor body to a location distal of a rigid support, the external thread extends continuously over 360 degrees around the longitudinal axis for at least a portion of the length of the anchor body, the anchor body including a second opening distal of the first opening, the anchor body including a third opening through the exterior surface of the anchor body and distal of the rigid support of the anchor body, wherein the third opening is distal of the second opening, wherein the rigid support has a leading distal surface, the rigid support extends across the longitudinal axis of the anchor body, the rigid support is integral with and attached to the anchor body to define a unitary single-piece component, the rigid support and the anchor body are made of the same material, the rigid support is disposed in a distal half of the anchor body, and the distal half of the anchor body includes the distal end of the anchor body, a wall is defined by the external helical thread on the exterior surface of the anchor body and a surface of the internal passage, and the rigid support is attached to the surface of the internal passage at two locations at an axially fixed longitudinal position; and

a suture strand extending out of the first opening of the anchor body, the suture strand having a first tail with a first end and a second tail with a second end, wherein the first tail and the second tail are unattached to each other prior to tissue fixation, wherein a portion of the suture strand is disposed in the internal passage between the rigid support and the first opening, the suture strand is supported by the leading distal surface of the rigid support, and the suture strand is disposed in the first opening, the second opening and the third opening of the anchor body.

2. The suture anchor assembly as recited in claim 1 wherein the second opening extends between the wall and the rigid support.

3. The suture anchor assembly as recited in claim 1 wherein the second opening is through the exterior surface of the anchor body.

4. The suture anchor assembly as recited in claim 1 wherein the portion of the suture strand disposed in the internal passage is surrounded by the external helical thread of the anchor body.

5. The suture anchor assembly as recited in claim 1 wherein a portion of the anchor body entirely surrounds the first opening at the proximal end.

6. The suture anchor assembly as recited in claim 1 wherein the external helical thread begins at the proximal end of the anchor body and ends in the distal half of the anchor body.

7. The suture anchor assembly as recited in claim 1 wherein at least a portion of the internal passage is defined by a first planar passage face and a second planar passage face that are both generally parallel to the longitudinal axis of the anchor body.

8. The suture anchor assembly as recited in claim 1 wherein the second opening and the third opening interrupt the external helical thread.

9. The suture anchor assembly as recited in claim 1 wherein the internal passage is a central passage.

10. The suture anchor assembly as recited in claim 1 wherein a portion of the first opening is a polygon.

11. The suture anchor assembly as recited in claim 10 wherein the portion of the first opening is a hexagon.

12. The suture anchor assembly as recited in claim 1 wherein each of the first tail and the second tail is slidable in two opposing directions within the internal passage.

13. The suture anchor assembly as recited in claim 1 wherein the internal passage has a first internal surface and a second internal surface spaced opposite to the first internal surface, a first space is defined between the rigid support and the first internal surface of the internal passage, a second space is defined between the rigid support and the second internal surface of the internal passage, the first tail is located in the first space, and the second tail is located in the second space, wherein the suture strand follows a path beginning with the first end of the first tail of the suture strand outside the anchor body, into the first space of the internal passage, around the rigid support, back through the second space of the internal passage, and ending at the second end of the second tail of the suture strand outside of the anchor body.

14. The suture anchor assembly as recited in claim 1 including a driver having a first planar driver face and a second planar driver face, the first planar driver face of the driver engageable with the first planar passage face of the internal passage and the second planar driver face of the driver engageable with the second planar passage face of the internal passage when the driver is received in the internal passage of the anchor body.

15. The suture anchor assembly as recited in claim 14 wherein the driver has a cannula, the cannula has a distal opening and a proximal opening, and the first end and the second end of the suture strand extend out of the first opening of the cannula.

16. The suture anchor assembly as recited in claim 14 wherein the driver includes a shaft having a shaft length, the shaft is received in the internal passage of the anchor body, the suture strand has a suture length, and the suture length of the suture strand is greater than the shaft length of the shaft.

17. The suture anchor assembly as recited in claim 1 wherein the wall extends from the proximal end of the anchor body to the rigid support.

18. The suture anchor assembly as recited in claim 1 wherein the wall includes a first wall portion and a second wall portion opposite the first wall portion, wherein the first wall portion and the second wall portion extend from the proximal end of the anchor body to the rigid support.

19. The suture anchor assembly as recited in claim 1 wherein the longitudinal axis of the anchor body is a central longitudinal axis, the rigid support has an axis substantially perpendicular to the central longitudinal axis of the anchor body, and the central longitudinal axis of the anchor body and the longitudinal axis of the rigid support intersect.

20. The suture anchor assembly as recited in claim 1 wherein a portion of the rigid support is entirely surrounded by the helical thread.

21. The suture anchor assembly as recited in claim 20 including a window extending through the wall and having a length that extends along the longitudinal axis, wherein the anchor body includes a fourth opening located at a proximal end of the window, and the fourth opening is adjacent the rigid support.

22. The suture anchor assembly as recited in claim 21 wherein the fourth opening is entirely surrounded by the external helical thread.

23. The suture anchor assembly as recited in claim 21 wherein the window has a proximal half, and at least a portion of the rigid support is located in the proximal half of the window.

24. A suture anchor assembly comprising:

an anchor body including a longitudinal axis, a length extending along the longitudinal axis, a proximal end, a distal end, the anchor body including an internal central passage extending from a first opening at the proximal end of the anchor body, the internal central passage extending along the longitudinal axis, and the internal central passage extending through at least a portion of the length of the anchor body, the anchor body including an external helical thread extending along the anchor body on a wall of the anchor body, wherein the external helical thread extends from the proximal end of the anchor body to a location distal of the rigid support, the external thread extends continuously over 360 degrees around the longitudinal axis for at least a portion of the length of the anchor body, the anchor body including a second opening and a third opening, the second opening disposed distal of the first opening, and the third opening disposed distal of the second opening and distal of a rigid support, wherein the rigid support is integral with and attached to the anchor body to define a unitary single-piece component, the rigid support and the anchor body are made of the same material, the rigid support is disposed in a distal half of the anchor body, the distal half of the anchor body including the distal end of the anchor body, the second opening is proximate to the rigid support, the rigid support includes a first end portion and an opposing second end portion, and both the first end portion and the opposing second end portion are integral with and attached to the wall; and

a suture strand disposed in the internal central passage, the suture strand having a first tail with a first end and a second tail with a second end, wherein the first tail and the second tail are unattached to each other prior to tissue fixation, wherein the suture strand is supported by the rigid support, the suture strand extends out the proximal end of the anchor body, and the suture strand is disposed in the first opening, the second opening and the third opening of the anchor body.

25. The suture anchor assembly as recited in claim 24 wherein the second opening is located between the rigid support and the external helical thread on the wall.

26. The suture anchor assembly as recited in claim 24 wherein a portion of the suture strand disposed in the internal central passage is surrounded by at least a portion of the external helical thread of the anchor body.

27. The suture anchor assembly as recited in claim 24 wherein a portion of the anchor body entirely surrounds the first opening at the proximal end.

28. The suture anchor assembly as recited in claim 24 wherein the external helical thread begins at the proximal end of the anchor body and ends in the distal half of the anchor body.

29. The suture anchor assembly as recited in claim 24 wherein the internal central passage has a first internal surface and a second internal surface spaced opposite to the first internal surface, and the rigid support is secured to and disposed between the first internal surface and the second internal surface at two locations at an axially fixed longitudinal position.

30. The suture anchor assembly as recited in claim 24 wherein the external helical thread defines a perimeter at least around the proximal end of anchor body.

31. The suture anchor assembly as recited in claim 24 wherein the internal central passage has a first internal surface and a second internal surface spaced opposite to the first internal surface, a first space is defined between one side of the rigid support and the first internal surface of the internal central passage, a second space is defined between an opposing side of the rigid support and the second internal surface of the internal central passage, the first tail is located in the first space, and the second tail is located in the second space, wherein the suture strand follows a path beginning with the first end of the first tail of the suture strand outside the anchor body, into the first space of the internal central passage, around the rigid support, back through the second space of the internal central passage, and ending at the second end of the second tail of the suture strand outside of the anchor body.

32. The suture anchor assembly as recited in claim 31 wherein the first tail and the second tail are unattached to each other, and each of the first tail and the second tail is moveable in two opposing directions within the internal central passage.

33. The suture anchor assembly as recited in claim 24 including a driver having a shaft with a shaft length, the shaft is received in the internal central passage of the anchor body, the suture strand has a suture length, and the suture length of the suture strand is greater than the shaft length of the shaft.

34. The suture anchor assembly as recited in claim 33 including a driver having a cannula, the cannula having a distal opening and a proximal opening, the first end and the second end extend out of the proximal opening of the cannula.

35. The suture anchor assembly as recited in claim 24 wherein the wall extends from the proximal end of the anchor body to the rigid support.

36. The suture anchor assembly as recited in claim 24 wherein the wall includes a first wall portion and a second wall portion opposite the first wall portion, wherein the first wall portion and the second wall portion extend from the proximal end of the anchor body to the rigid support.

37. The suture anchor assembly as recited in claim 24 wherein the longitudinal axis of the anchor body is a central longitudinal axis, the rigid support has an axis substantially perpendicular to the central longitudinal axis of the anchor body, and the central longitudinal axis of the anchor body and the longitudinal axis of the rigid support intersect.

38. The suture anchor assembly as recited in claim 24 wherein a portion of the rigid support is entirely surrounded by the helical thread.

39. The suture anchor assembly as recited in claim 24 including a window extending through the wall and having a length that extends along the longitudinal axis, wherein the anchor body includes a fourth opening located at a proximal end of the window, and the fourth opening is adjacent the rigid support.

40. The suture anchor assembly as recited in claim 39 wherein the fourth opening is entirely surrounded by the external helical thread.

41. The suture anchor assembly as recited in claim 39 wherein the window has a proximal half, and at least a portion of the rigid support is located in the proximal half of the window.