Knotless suture anchor

• US 9,078,646 B2
• Filed: 11/13/2013
• Issued: 07/14/2015
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: Depuy Mitek LLC (Johnson & Johnson)
• Original Assignee: Depuy Mitek LLC (Johnson & Johnson)
• Inventors: Lizardi, Jose E., Sengun, Mehmet Ziya
• Primary Examiner(s): Dornbusch, Dianne
• Assistant Examiner(s): LYNCH, ROBERT A
• Application Number:
  US14/078,660
• Publication Number:
  US 20140107701A1
• Time in Patent Office: 608 Days
• Field of Search: 606/60, 606/104, 606/144, 606/148, 606/232, 606/301, 606/313, 606/916, 623/13.11, 623/13.13, 623/13.14, 623/13.18
• 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 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• 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 2017/042 plastically deformed during insertion
• CPC Class Codes: A61B 2017/0424 the separate member staying in the anchor after placement
• CPC Class Codes: A61B 2017/0425 the anchor or the separate member comprising threads, e.g. a set screw in the anchor
• CPC Class Codes: A61B 2017/0432 the separate member staying in the anchor after placement
• CPC Class Codes: A61B 2017/0433 the anchor or the separate member comprising threads, e.g. a set screw or a worm gear for moving spreading members
• CPC Class Codes: A61B 2017/0438 slotted, i.e. having a longitudinal slot for enhancing their elasticity
• CPC Class Codes: A61B 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61B 2017/0445 cannulated, e.g. with a longitudinal through-hole for passage of an instrument
• CPC Class Codes: A61B 2017/0446 Means for attaching and blocking the suture in the suture anchor
• CPC Class Codes: A61B 2017/0448 Additional elements on or within the anchor
• CPC Class Codes: A61B 2017/045 snug fit within the anchor

Abstract

A suture anchor is disclosed having an outer body with an axial bore which receives and inner body for rotation. Suture passes between the inner body and outer body and rotation of the inner body wraps the suture thereabout locking the suture thereto. Rotation of the inner body also effects radial expansion of at least a portion of the outer body to engage to anchor into a bone hole.

Claims

1. A method of attaching tissue to a bone comprising the steps of:

passing a limb of suture from the tissue between a suture anchor outer body, which has a distal end, a proximal end and an axial bore therethrough, and an inner body receivable within the outer body;

inserting the outer body into the bone;

sliding the suture between the inner body and the outer body to achieve a desired tension thereon or desired position of the tissue;

capturing the suture limb between the inner body and the outer body, by wrapping at least a segment of the suture limb about the inner body, to prevent sliding of the suture limb therebetween; and

radially expanding at least a portion of the outer body to engage the suture anchor into the bone by moving the inner body proximally into the outer body by engaging outer threads on the proximal end of the inner body with mating inner threads on the proximal end of the outer body.

2. A method according to claim 1 wherein the distance between the tissue and the anchor stays substantially the same during the step of capturing.

3. A method according to claim 1 wherein the suture limb is wrapped around the inner body at least two times.

4. A method according to claim 1 wherein the inner body has at least one radially extending projection and the step of wrapping comprises rotating the inner body within the outer body during which the projection engages the suture limb to cause it to wrap about the inner body.

5. A method according to claim 1 wherein rotation of the inner body effects simultaneously the step of wrapping the suture limb about the inner body and the step of engaging the outer threads on the inner body with the inner threads on the outer body.