Distal bone anchors for bone fixation with secondary compression
First Claim
Patent Images
1. A femoral neck fracture fixation device, comprising:
- an elongate body, having a proximal end and a distal end;
a helical anchor on the distal end, the helical anchor being wrapped about a central core which defines a minor diameter of the helical anchor, an outer edge of the helical anchor defining an outer boundary;
a first retention structure on the body, proximal to the anchor; and
a proximal anchor, moveably carried by the body, wherein the proximal anchor is movable in the distal direction with respect to the body and the retention structure resists proximal movement of the proximal anchor with respect to the body and;
wherein the central core includes an axial lumen, the axial lumen extending from the proximal end of the body to the distal end of the body to accommodate placement of the elongate body over a placement wire.
6 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a bone fracture fixation device, such as for reducing and compressing fractures in the proximal femur. The fixation device includes an elongate body with a helical cancellous bone anchor on a distal end. An axially moveable proximal anchor is carried by the proximal end of the fixation device. The device is rotated into position across the fracture or separation between adjacent bones and into the adjacent bone or bone fragment, and the proximal anchor is distally advanced to apply secondary compression and lock the device into place. The device may also be used for soft tissue attachments.
-
Citations
27 Claims
-
1. A femoral neck fracture fixation device, comprising:
- an elongate body, having a proximal end and a distal end;
a helical anchor on the distal end, the helical anchor being wrapped about a central core which defines a minor diameter of the helical anchor, an outer edge of the helical anchor defining an outer boundary;
a first retention structure on the body, proximal to the anchor; and
a proximal anchor, moveably carried by the body, wherein the proximal anchor is movable in the distal direction with respect to the body and the retention structure resists proximal movement of the proximal anchor with respect to the body and;
wherein the central core includes an axial lumen, the axial lumen extending from the proximal end of the body to the distal end of the body to accommodate placement of the elongate body over a placement wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- an elongate body, having a proximal end and a distal end;
-
17. A bone fixation device, comprising:
- an elongate body having a proximal end and a distal end;
a cancellous bone anchor on the distal end;
the cancellous bone anchor comprising a helical flange wrapped about a central core that defines an axial lumen, an outer edge of the helical flange defining an outer boundary and the central core defining a minor diameter;
a proximal anchor axially movably carried on the body; and
complimentary surface structures in between the body and the proximal anchor that permit advancing the proximal anchor in the distal direction to tighten the fixation device but that resist axial proximal movement of the proximal anchor;
wherein the axial lumen extends from the proximal end of the body to the distal end of the body. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- an elongate body having a proximal end and a distal end;
Specification