System and method for securing tissue to bone

Patent metadata

Field	Value
Publication number	US-11020217-B2
Application number	US-201815893958-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Mar 15, 2013
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Disclosed herein are methods and devices for securing soft tissue to a rigid material such as bone. A tissue anchoring device is described that comprises an anchor body and a spreader such that tissue may be captured or compressed between outside surfaces on the anchor and inside surfaces of a bone tunnel to secure the tissue within the tunnel. Methods are described that enable use of the bone anchoring device to secure a tissue graft into the tibial and femoral bones during anterior cruciate ligament (“ACL”) reconstruction.

First claim

What is claimed is:

1. An expandable bone anchor, comprising:
an anchor body extending along a longitudinal axis comprising:
a distal tapered anchor tip; and
a plurality of rigid side portions, each of which includes a free proximal end and a distal end and extending proximally from the anchor tip, each side portion coupled to the anchor tip through a double hinge;

a spreader configured to advance distally into the anchor body, thereby causing the rigid side portions to expand outward, wherein the spreader is directly coupled to the side portions, and
wherein each side portion is configured to expand to a greater extent at the respective free proximal end as compared to the respective distal end.

2. The anchor of claim 1 , wherein the spreader is slidably coupled to the side portions.

3. The anchor of claim 2 , wherein the spreader comprises a plurality of longitudinal tracks and each side portion is coupled to one of the tracks such that the side portions can slide longitudinally along the tracks.

4. The anchor of claim 1 , wherein the spreader comprises at least a portion that is tapered distally.

5. The anchor of claim 1 , wherein the anchor tip comprises a proximal locking member and the spreader comprises a distal locking member, wherein the two locking members are configured to lock together upon maximal distal advancement of the spreader.

6. The anchor of claim 5 , wherein the proximal locking member on the anchor tip comprises a post having an outwardly protruding ridge and the distal locking member on the spreader comprises a hollow cylinder configured to receive the post.

7. The anchor of claim 6 , wherein the hollow cylinder comprises a groove on an inside surface configured to receive the protruding ridge.

8. The anchor of claim 6 , wherein the hollow cylinder comprises expandable tabs.

9. The anchor of claim 1 , wherein upon maximal expansion, the rigid side portions are expanded to a uniform extent away from the longitudinal axis along their length with respect to each other.

Assignees

• Conmed Corp

Inventors

• Heaven Malcolm
• Greelis John P
• Sirivong Mikxay
• Yurek Matthew T

Classifications

• A61B17/0401

  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 title

• A61F2/0811 Primary

  Fixation devices for tendons or ligaments · CPC title

• A61F2002/0882

  Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone · CPC title

• A61F2002/0858

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

• A61F2002/0835

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