SYSTEM AND METHOD FOR SECURING TISSUE TO BONE
Disclosed herein are methods and devices for securing soft tissue to a rigid material such as bone. A tissue capture anchor is described that includes an anchor body and a spreader such that tissue may be captured or compressed between outside surfaces on the anchor and spreader and inside surfaces of a bone hole to secure the tissue within the hole. A bone anchor is described that includes an anchor body with expandable tines and a spreader that expands the tines into bone. The spreader captures tissue via a suture loop at the distal end of the bone anchor. Also described is an inserter that can be used to insert the anchor into bone and move the spreader within the anchor to expand the anchor and capture the tissue between the anchor and the bone. Methods are described that allow the use of bone anchors to secure tissue to bone.
1 . A tissue capture anchor and inserter combination comprising:
an anchor comprising: an expandable anchor body; and a spreader configured for displacement along an axis of the anchor body between a first position and a second position, the spreader comprising: a plurality of spikes configured to engage with tissue; and an angled portion configured to expand the anchor body as the spreader is advanced from the first position to the second position; wherein each of the plurality of spikes separately extends from the distal most surface of the spreader to a distal most spike surface that is substantially flat and transverse to the axis of the anchor body and facing the second direction along the axis away from the first proximal direction; and wherein each of the plurality of spikes includes a first substantially flat side extending along a first plane, a second substantially flat side opposite the first side extending along a second plane and parallel to the first plane, and a third side opposite a fourth side;
a handle;
an outer tube coupled to the handle;
an inner rod or tube positioned within the outer tube and coupled to the spreader;
an actuator shaft positioned within the handle and coupled to the inner rod or tube; and
a deployment knob coupled to the handle and the actuator shaft and configured to move the actuator shaft relative to the handle and the inner rod or tube relative to the outer tube;
wherein the inserter tool is configured to draw the spreader into the bone anchor to fully deploy the tissue capture anchor and secure tissue to the bone.