Biceps Tenodesis Anchor Implants

Patent metadata

Field	Value
Publication number	US-2016113758-A1
Application number	US-201514610626-A
Country	US
Kind code	A1
Filing date	Jan 30, 2015
Priority date	Oct 23, 2014
Publication date	Apr 28, 2016
Grant date	—

Abstract

Various bone anchor assemblies and methods are provided for anchoring tissue to bone. In one embodiment, an anchor assembly for anchoring a tendon to bone is provided and includes a substantially cylindrical sheath having bone-engaging surface features formed on an external surface thereof, and having an inner lumen formed therein and extending from an open proximal end to a substantially closed distal. The substantially closed distal end includes at least one tendon anchoring feature extending distally therefrom and configured to facilitate anchoring of a tendon to bone. The anchor assembly further includes an expander having a generally elongate cylindrical configuration and being sized and shaped to be received within the inner lumen of the sheath.

First claim

What is claimed is:

1 . An anchor assembly for anchoring a tendon to bone, comprising:
a substantially cylindrical sheath having bone-engaging surface features formed on an external surface thereof, and having an inner lumen formed therein and extending from an open proximal end to a substantially closed distal, the substantially closed distal end including at least one tendon anchoring feature extending distally therefrom and configured to facilitate anchoring of a tendon to bone; and an expander having a generally elongate cylindrical configuration and being sized and shaped to be received within the inner lumen of the sheath, the expander having a lumen extending therethrough for receiving a guidewire.

2 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises at least one prong extending distally from a distal-facing surface of the sheath.

3 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises first and second prongs extending distally from a distal-facing surface of the sheath and extending substantially parallel to one another.

4 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises first, second, and third prongs extending distally from a distal-facing surface of the sheath.

5 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises at least one prong having a distal pointed tip configured to penetrate through tissue.

6 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises first and second extension tabs extending distally from opposed sidewalls of the sheath, the tabs defining a generally U-shaped recess therebetween.

7 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises a semi-circular hook.

8 . The anchor assembly of claim 1 , wherein the at least one tendon anchoring feature comprises a hoop having an opening formed therethrough for receiving a tendon.

9 . The anchor assembly of claim 1 , wherein the open proximal end of the sheath includes opposed flanges extending radially outward therefrom and configured to limit an insertion depth of the sheath into a bone hole.

10 . The anchor assembly of claim 1 , wherein the open proximal end of the sheath includes at least one tab extending radially outward therefrom and configured to rest against a bone surface when the sheath is implanted in a bone hole.

11 . The anchor assembly of claim 1 , wherein the sheath includes first and second opposed slots extending proximally from the distal end, the opposed slots being configured to allow the sheath to expand radially outward when the expander is received therein.

12 . The anchor assembly of claim 1 , wherein the sheath includes at least rib formed on the external surface thereof and extending longitudinally in a proximal-distal direction.

13 . The anchor assembly of claim 1 , wherein the expander includes a flange extending radially outward from a proximal end thereof.

14 . An anchor assembly for anchoring a tendon to bone, comprising:
a sheath having a body with at least two sidewalls extending proximally therefrom, the sidewalls defining an inner lumen therebetween, and the sidewalls having threads formed on an internal surface thereof, and the sheath having a tendon engaging feature extending distally from a distal-most surface thereof, the tendon engaging feature being configured to engage and retain a tendon within a bone hole; and a threaded expander configured to be received between the pair of sidewalls and to threadably mate with the threads formed on the internal surface of the sidewalls; wherein the sheath and the threaded expander are configured such that, when the expander is fully threaded into the sheath, the sheath expands radially outward to retain a tendon within a bone hole.

15 . The anchor assembly of claim 14 , wherein the tendon engaging feature comprises at least two prongs spaced a distance apart from one another.

16 . The anchor assembly of claim 14 , wherein the tendon engaging feature comprises folding prongs configured to move radially inward toward one another to engage a tendon therebetween.

17 . The anchor assembly of claim 14 , wherein the tendon engaging feature comprises first and second extension tabs extending distally from opposed sidewalls of the sheath, the tabs defining a generally U-shaped recess therebetween.

18 . The anchor assembly of claim 14 , wherein the tendon engaging feature comprises a hook-shaped member.

19 . The anchor assembly of claim 14 , wherein the tendon engaging feature comprises a hoop having an opening therethrough for receiving a tendon.

20 . A method for anchoring a tendon to bone, comprising:
manipulating a sheath to engage a tendon with a tendon engaging feature extending distally from a distal end of the sheath; inserting the sheath, with the tendon coupled to the tendon engaging feature, into a bone hole such that the tendon extends around the sheath; and inserting an expander into the sheath to cause the sheath to expand radially outward to thereby anchor the tendon and the sheath within the bone hole.

21 . The method of claim 20 , wherein the tendon engaging feature comprises prongs that penetrate through the tendon to couple the tendon to the sheath.

22 . The method of claim 20 , wherein the tendon engaging feature comprises tabs and the tendon is positioned between the tabs.

23 . The method of claim 20 , wherein the tendon engaging feature comprises a hook that the tendon is hooked onto.

24 . A method for anchoring a tendon to a bone, comprising;
positioning a tendon across a bone hole and maintaining the tendon at a desired tension; positioning a sheath having a pair of tendon engaging features extending distally from the sheath proximate to the tendon; manipulating the sheath to determine an engagement point along the tendon at a distance from the bone hole, the distance being measured using the pair of tendon engaging features; and engaging the tendon at the engagement point with the pair of tendon engaging features and inserting the sheath with the tendon coupled thereto into the bone hole.

25 . The method of claim 24 , wherein the distance is substantially equal to a depth of the bone hole.

26 . The method of claim 24 , wherein the distance is measured by rotating the sheath to move the prongs along the tendon.

Assignees

• Depuy Synthes Products Inc

Inventors

• Diduch David R
• Getelman Mark H
• Mahoney Jr James J
• Marks Jacob A
• Miller Gerome
• Ravenscroft Matthew J
• Sengun Mehmet Z
• Tang Howard C
• Weitzel Paul P
• Whittaker Gregory R

Classifications

• A61F2/0805

  Implements for inserting tendons or ligaments · CPC title

• A61F2002/0888

  Anchor in or on a blind hole or on the bone surface without formation of a tunnel · CPC title

• A61F2002/0858

  Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges · CPC title

• A61F2002/0841

  Longitudinal channel for insertion tool running through the whole tendon anchor, e.g. for accommodating bone drill, guidewire · CPC title

• A61F2002/0835

  with deformation of anchor parts, e.g. expansion of dowel by set screw · CPC title