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EP-4464258-B1 - DUAL EXPANSION ANCHOR

EP4464258B1EP 4464258 B1EP4464258 B1EP 4464258B1EP-4464258-B1

Inventors

  • HEAVEN, MALCOLM
  • GREELIS, JOHN, P.

Dates

Publication Date
20260513
Application Date
20121004

Claims (16)

  1. A bone anchor (950), comprising: a bone engaging member (100, 410, 952) comprising: a first proximal bone engaging portion (120b, 422, 964) and a second distal bone engaging portion (120a, 418, 960); and an expansion feature configured to allow radial expansion of the first bone engaging portion (120b, 422, 964) and the second bone engaging portion (120a, 418, 960); a two-piece expander (900) having a first proximal expansion portion (924) and a separable, second distal expansion portion (914), a portion of which is conically shaped, and with a second shaft portion (918) extending proximally therefrom; wherein the two-piece expander (900) is displaceable between a first position relative to the bone engaging member (100, 410, 952) and a second position relative to the bone engaging member (100, 410, 952); a tissue capture feature; and wherein the first expansion portion (904) of the expander is configured to expand the first bone engaging portion (120b, 422, 964) of the bone engaging member (100, 410, 952) and the second expansion portion (902) of the expander (900) is configured to expand the second bone engaging portion (120a, 418, 960) of the bone engaging member (100, 410, 952) when the expander is in the second position; characterized in that the first proximal expansion portion (924) has first shaft portion (928) extending proximally therefrom.
  2. The bone anchor (950) of claim 1, wherein the expansion feature comprises a slot in the bone engaging member (100, 410, 952) extending from the first bone engaging portion (120b, 422, 964) to the second bone engaging portion (120a, 418, 960).
  3. The bone anchor (950) of one of the preceding claims, wherein the expansion feature comprises a plurality of slots in the bone engaging member (100, 410, 952) extending from the first bone engaging portion (120b, 422, 964) to the second bone engaging portion (120a, 418, 960).
  4. The bone anchor (950) of claim 3, wherein the plurality of slots in the bone engaging member (100, 410, 952) are parallel.
  5. The bone anchor (950) of one of the preceding claims, wherein the expansion feature comprises: a first slot (420, 862, 962) in the bone engaging member (100, 410, 952) starting at the first bone engaging portion (120b, 422, 964) and extending longitudinally towards the second bone engaging portion (120a, 418, 960); and a second slot (424) in the bone engaging member (100, 410, 952) starting at the second bone engaging portion (120a, 418, 960) and extending longitudinally towards the first bone engaging portion (120b, 422, 964); wherein the first expansion slot (420, 862, 962) in the bone engaging member (100, 410, 952) does not intersect the second expansion slot (424) in the bone engaging member (100, 410, 952).
  6. The bone anchor (950) of one of the preceding claims, wherein the expansion feature comprises: a first group of slots (420, 862, 962) in the bone engaging member (100, 410, 952) starting at the first bone engaging portion (120b, 422, 964) and extending longitudinally towards the second bone engaging portion (120a, 418, 960); and a second group of slots (424) in the bone engaging member (100, 410, 952) starting at the second bone engaging portion (120a, 418, 960) and extending longitudinally towards the first bone engaging portion (120b, 422, 964); wherein the first group of slots (420, 862, 962) in the bone engaging member (100, 410, 952) does not intersect the second group of slots (424) in the bone engaging member (100, 410, 952).
  7. The bone anchor (950) of claim 6, wherein the expansion slots (420, 424, 862, 962) in the bone engaging member (100, 410, 952) are parallel.
  8. The bone anchor (950) of claim 6 or 7, wherein the first group of slots (420, 862, 962) in the bone engaging member (100, 410, 952) are equiangularly positioned around the first bone engaging portion (120b, 422, 964).
  9. The bone anchor (950) of claim 6, 7 or 8, wherein the second group of slots (420) in the bone engaging member (100, 410, 952) are equiangularly positioned around the second bone engaging portion (120a, 418, 960).
  10. The bone anchor (950) of claim 6, 7, 8 or 9, wherein the first group of slots in the bone engaging member (100, 410, 952) comprises four slots.
  11. The bone anchor (950) of claim 6, 7, 8, 9 or 10, wherein the second group of slots (424) in the bone engaging member (100, 410, 952) comprises four slots.
  12. The bone engaging member (100, 410, 952) of one of the preceding claims, further comprising an axial bore (416, 858, 958).
  13. The bone engaging member (100, 410, 952) of one of the preceding claims, further comprising at least one ridge (428) located at the first bone engaging portion.
  14. The bone engaging member (100, 410, 952) of claim 13, wherein the ridge (428) is configured for fixating engagement with the bone when the first bone engaging (120b, 422, 964) portion of the bone engaging member (100, 410, 952) is expanded.
  15. The bone engaging member (100, 410, 952) of claim 13 or 1, wherein the ridge (428) is configured for fixating engagement with the bone when the second bone engaging portion (120a, 418, 960) of the bone engaging member (100, 410, 952) is expanded.
  16. The bone engaging member (100, 410, 952) of one of the preceding claims, further comprising a ridge (428) located at the second bone engaging portion (120a, 418, 960).

Description

This application claims the benefit of U.S. Provisional Application No. 61/543,284, filed on October 4, 2011. Background of the Invention Field of the Invention The present invention relates to medical devices. More particularly, the present invention relates to devices for securing soft tissue to a rigid material such as bone. Description of the Related Art There are several medical procedures where a surgeon needs to attach soft tissue such as tendons or other soft connective tissue to bone. One common example is a biceps tenodesis, a surgical procedure usually performed for the treatment of biceps tendonitis of the shoulder. A biceps tenodesis may be performed as an isolated procedure, but more often is part of a larger shoulder surgery such as a rotator cuff repair. The biceps tendon connects the biceps muscle to the bone. The tendon passes from the muscle to the shoulder joint. Patients with biceps tendon problems may have a detachment of the biceps tendon from the radial tuberosity, for example, or they may have inflammation and irritation of the biceps tendon itself. Biceps tendon problems can also occur in conjunction with a rotator cuff tear. A biceps tenodesis is a procedure that cuts the normal attachment of the biceps tendon on the shoulder socket and reattaches the tendon to the bone of the humerus (arm bone). By performing a biceps tenodesis, the pressure of the biceps attachment is taken off the cartilage rim of the shoulder socket (the labrum), and a portion of the biceps tendon can be surgically removed. Essentially a biceps tenodesis moves the attachment of the biceps tendon to a position that is out of the way of the shoulder joint. To perform a biceps tenodesis repair, typically a surgical procedure is used and requires the multiple steps of externalizing the tendon, whip stitching it, threading suture through a tenodesis screw, drilling the necessary bone hole and anchor insertion via screwing it in. This is a difficult procedure arthroscopically. Systems recently brought to market still require multiple steps and tools. Bone anchors for securing soft tissue to a bone are known from EP 2 266 469 A1, EP 1 348 380 A1, WO 2011/046982 A1 and WO 2010/088561 A2. Summary of the Invention The present invention is defined by the features of the independent claim. Embodiments of the invention are defined in the dependent claims. Some embodiments relate to a bone anchor. A bone anchor can include, for example, a bone engaging member having a first proximal bone engaging portion and a second distal bone engaging portion and an expansion feature that allows radial expansion of the first bone engaging portion and the second bone engaging portion. A bone anchor can further include an expander with a first proximal expansion portion and a second distal expansion portion and displaceable between a first position relative to the bone engaging member and a second position relative to the bone engaging member and a tissue capture feature. In some embodiments, the first expansion portion of the expander can expand the first bone engaging portion of the bone engaging member and the second expansion portion of the expander can expand the second bone engaging portion of the bone engaging member when the expander is in the second position. Some embodiments relate to a bone anchor. A bone anchor can include, for example, a bone engaging member having a first end and a second end. The bone engaging member can include a first plurality of bone-engaging tines extending longitudinally towards the first end, a second plurality of bone-engaging tines extending longitudinally towards the second end, and an expander having a first portion and a second portion positioned along a longitudinal axis. In some embodiments, the expander can be positioned between the first plurality of bone engaging tines when the expander is in a first position. In some embodiments, the expander is positioned between the first plurality of bone engaging tines and between the second plurality of bone engaging tines when the expander is in a second position. In some embodiments, the expander can expand both the first set of tines and the second set of tines outward upon movement of the expander relative to the bone-engaging member from a first position to a second position. Some embodiments relate to a bone anchor. A bone anchor can include, for example, a bone engaging member having a first proximal bone engaging portion and a second distal bone engaging portion and an expansion feature that allows radial expansion of the first bone engaging portion and the second bone engaging portion. Some embodiments of a bone anchor can include a two piece expander having a first expansion member with a first expansion portion and a second expansion member with a second expansion portion. In some embodiments, the first expansion member and the second expansion member can be displaceable between first positions relative to the bone engaging member and second