Method and apparatus for bone fixation with secondary compression
First Claim
1. A femoral neck fracture fixation device, comprising:
- an elongate body, having a proximal end and a distal end and comprising a first portion and a second portion that are detachably coupled to each other at a junction;
a helical anchor on the distal end;
a retention structure on the body, proximal to the anchor; and
an anti-rotational structure on the first portion of the body, a proximal anchor, moveably carried by the body and comprising a tubular sleeve that in a first position extends distally past the junction between the first portion and the second portion, wherein the proximal anchor is movable in the distal direction with respect to the body, the retention structure resists proximal movement of the proximal anchor with respect to the body and the anti-rotational structure prevents rotational movement of the first portion of the body with respect to the proximal anchor.
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Accused Products
Abstract
Disclosed is a fracture fixation device, for reducing and compressing fractures in a bone. The fixation device includes an elongate body comprising a first portion and a second portion that are detachably coupled to each other. The first portion defines a helical cancellous bone anchor and the second portion defines a distal end. An axially moveable proximal anchor is carried by the proximal end of the fixation device and is rotationally locked to the first portion. The device is rotated into position across the femoral neck and into the femoral head, and the proximal anchor is distally advanced to lock the device into place. The second portion is then detached from the first portion.
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Citations
33 Claims
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1. A femoral neck fracture fixation device, comprising:
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an elongate body, having a proximal end and a distal end and comprising a first portion and a second portion that are detachably coupled to each other at a junction;
a helical anchor on the distal end;
a retention structure on the body, proximal to the anchor; and
an anti-rotational structure on the first portion of the body, a proximal anchor, moveably carried by the body and comprising a tubular sleeve that in a first position extends distally past the junction between the first portion and the second portion, wherein the proximal anchor is movable in the distal direction with respect to the body, the retention structure resists proximal movement of the proximal anchor with respect to the body and the anti-rotational structure prevents rotational movement of the first portion of the body with respect to the proximal anchor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A bone fracture fixation device, comprising:
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an elongate body, having a proximal end and a distal end and comprising a first portion and a second portion that are detachably coupled to each other at a junction;
a bone anchor on the distal end;
a proximal anchor, moveably carried by the body and comprising a tubular sleeve that in a first position extends distally past the junction between the first portion and the second portion, complimentary surface structures in between the first portion of 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 and prevent rotational movement between the first portion and the proximal anchor.
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10. A method of treating a femoral fracture, comprising the steps of:
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drilling a bore distally into the femur in the direction of a fracture;
advancing into the bore a fixation device that comprises a body having a first portion that forms a cancellous bone anchor and a second portion that forms a proximal end;
rotating a proximal anchor of the fixation device so to engage the cancellous bone anchor with bone tissue distal of the femoral fracture; and
advancing the proximal anchor distally along the fixation device to compress the fracture. - View Dependent Claims (11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33)
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17. A method of securing a first bone fragment to a second bone fragment, comprising the steps of:
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drilling a bore through the first bone fragment in the direction of the second bone fragment;
advancing through the bore a fixation device that comprises a body having a first portion that forms a cancellous bone anchor and a second portion that forms a proximal end;
rotating at a proximal anchor of the fixation device first portion to secure the fixation device to the second fragment; and
axially advancing the proximal anchor of the fixation device to engage the first fragment.
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27. A bone fixation device, comprising:
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an elongate body, having a proximal end and a distal end;
a helical anchor on the distal end;
a retention structure on the body, proximal to the anchor; and
an anti-rotational structure on the first portion of the body, a proximal anchor, moveably carried by the body and comprising a tubular sleeve that in a first position extends distally past the junction between the first portion and the second portion, an elongated member configured so as to be detachably coupled to the proximal end of the elongate body and configured to extend proximally through the proximal anchor such that proximal traction can be applied to the elongate body;
wherein the proximal anchor is movable in the distal direction with respect to the body, the retention structure resists proximal movement of the proximal anchor with respect to the body and the anti-rotational structure prevents rotational movement of the first portion of the body with respect to the proximal anchor.
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Specification