Suture anchor with insert-molded rigid member

• US 8,821,541 B2
• Filed: 09/12/2006
• Issued: 09/02/2014
• Est. Priority Date: 02/02/1999
• Status: Expired due to Term

• Current Assignee: Arthrex Incorporated
• Original Assignee: Arthrex Incorporated
• Inventors: Dreyfuss, Peter J., Benavitz, William C.
• Primary Examiner(s): Dornbusch, Dianne
• Application Number:
  US11/518,872
• Publication Number:
  US 20070073299A1
• Time in Patent Office: 2,912 Days
• Field of Search: 606/232, 606 72- 74, 411/320, 411/142, 411/199, 411/216, 411/356, 411/357, 411/76, 411/350, 411/555
• 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 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 comprising:

an anchor body having a longitudinal axis, a proximal end, a distal end, a central passage, a first suture opening, and a second suture opening, wherein the central passage extends along the longitudinal axis, the central passage extends from the first suture opening which is located at the proximal end of the anchor body and through a portion of a length of the anchor body, the first suture opening is encircled by a perimeter of the anchor body, and the second suture opening extends through a portion of the anchor body;

a rigid support fixed to the anchor body, wherein the rigid support extends across the central passage and has a first portion and a second portion spaced from the first portion, the first portion branching from a first wall portion of the anchor body and the second portion branching from a second wall portion of the anchor body, the rigid support spaced axially away from the first suture opening along the longitudinal axis of the anchor body, and the second suture opening is disposed near the rigid support; and

at least one suture strand threaded into the central passage, wherein the at least one suture strand is supported by the rigid support and threaded through the first suture opening and the second suture opening of the anchor body.

2. The suture anchor according to claim 1, wherein the second suture opening is defined in part by the rigid support and a portion of the anchor body.

3. The suture anchor according to claim 2, including a third suture opening extending through the anchor body, wherein the third suture opening is disposed distal of the second suture opening, and the at least one suture strand is disposed in the first suture opening, the second suture opening, and the third suture opening.

4. The suture anchor according to claim 3, wherein the third suture opening forms in part a suture passage that extends across the longitudinal axis of the anchor body.

5. The suture anchor according to claim 3, wherein the at least one suture strand follows a path beginning with a first end of the at least one suture strand outside of the anchor body, through the first suture opening, through the central passage, through the second suture opening, through the third suture opening, around the rigid support, back through the central passage, back through the first suture opening, and ending at a second end of the at least one suture strand outside of the anchor body.

6. The suture anchor according to claim 1, wherein the at least one suture strand follows a path beginning with a first end of the at least one suture strand outside of the anchor body, through the first suture opening, through the central passage, through the second suture opening, around the rigid support, back through the central passage, back through the first suture opening, and ending at a second end of the at least one suture strand outside of the anchor body.

7. The suture anchor according to claim 1, wherein the second suture opening is located in a distal half of the anchor body, and the distal half includes the distal end of the anchor body.

8. The suture anchor according to claim 1, wherein the suture anchor and the rigid support are made of the same material.

9. The suture anchor according to claim 1, wherein the second suture opening forms in part a suture passage that extends along the longitudinal axis of the anchor body to the first suture opening.

10. A suture anchor assembly comprising:

an anchor body including a longitudinal axis, a proximal end, a distal end, and a central passage extending along the longitudinal axis from an opening at the proximal end of the anchor body through a portion of a length of the anchor body, wherein the opening is a first suture opening, the anchor body including a second suture opening disposed distal of the first suture opening, and a third suture opening disposed distal of the second suture opening, wherein a helical thread defines a perimeter at least around the proximal end of the anchor body;

a rigid support extending across the central passage, the rigid support having a first portion and a second portion spaced from the first portion, the first portion branching from a first wall portion of the anchor body and the second portion branching from a second wall portion of the anchor body, wherein the third suture opening is disposed distal of the rigid support;

at least one suture strand haying a suture length threaded into the central passage, supported by the rigid support, and threaded past the proximal end of the anchor body, wherein at least a portion of the at least one suture strand is disposed in the central passage between the rigid support and the opening at the proximal end, and the at least one suture strand is disposed in the first suture opening, the second suture opening, and the third suture opening; and

a driver including a shaft having a shaft length, wherein the shaft engages the anchor body, and the suture length of the at least one suture strand is greater than the shaft length of the shaft.

11. A suture anchor assembly comprising:

an anchor body including a distal end, a proximal end having, an opening, a central longitudinal axis, a first wall portion, a second wall portion spaced opposite to the first wall portion, and a suture passage beginning at the proximal end of the anchor body, wherein the suture passage extends about the central longitudinal axis, and the suture passage extends from the opening located at the proximal end of the anchor body and at least partially along a length of the anchor body, wherein the opening is a first suture opening that is encircled by a perimeter of the anchor body, a second suture opening extends through a portion of the anchor body, and a third suture opening extends through the anchor body, wherein the third suture opening is disposed distal of the second suture opening;

a rigid support integral with the anchor body to define a single-piece component, wherein the rigid support extends across the suture passage and has a first portion and a second portion spaced from the first portion, the first portion branching from the first wall portion of the anchor body and the second portion branching from the second wall portion of the anchor body, and the rigid support is spaced axially away from the opening at the proximal end along the central longitudinal axis; and

at least one suture strand threaded into the suture passage, supported by the rigid support, and having ends that extend past the proximal end of the anchor body, and the at least one suture strand is disposed in the first suture opening, the second suture opening, and the third suture opening.