Bone fixation system with radially extendable anchor
AssigneeTriage Medical, Inc.
InventorsBrad S. Culbert, Victor V. Cachia
Life of this patent
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Abstract
Disclosed is a bone fixation device of the type useful for connecting soft tissue or tendon to bone or for connecting two or more bones or bone fragments together. The device comprises an elongate body having a distal anchor thereon. A proximal anchor is axially movably disposed with respect to the distal anchor, to accommodate different bone dimensions and permit appropriate tensioning of the fixation device.
Claims30
A bone fixation device, for securing a first bone fragment to a second bone fragment, comprising:
- an elongate pin, having a proximal end and a distal end;
- at least one radially advanceable anchor carried by the pin;
- an actuator, axially moveable with respect to the pin;
- and
- at least one retention structure in between the pin and the actuator, for permitting proximal movement of the pin with respect to the actuator but resisting distal movement of the pin with respect to the actuator;
- wherein axial proximal movement of the pin with respect to the actuator causes at least a portion of the anchor to advance along a path which is inclined radially outwardly from the pin in the proximal direction.
A method of implanting a fixation device in a bone, comprising the steps of:
- advancing a fixation device into bone;
- proximally retracting a portion of the fixation device;
- and
- advancing at least one tine on the fixation device into bone in response to the proximally retracting step;
- the advancing step comprising advancing the tine along a path which inclines radially outwardly from an axis of the fixation device in the proximal direction.
A method of fixing a first bone fragment with respect to a second bone fragment, comprising the steps of:
- advancing a fixation device through a first bone fragment and into a second bone fragment;
- proximally retracting a portion of the fixation device;
- and
- advancing at least one tine on the fixation device into the second bone fragment in response to the proximally retracting step;
- the advancing step comprising advancing the tine along a path which inclines radially outwardly at an angle from an axis of the fixation device in the proximal direction.
A method of embedding a tine in cancellous bone, comprising the steps of:
- providing a bone anchor having at least one tine thereon, the tine having an elongate body with a longitudinal axis, a proximal end, and a distal end, wherein the distal end is connected to the bone anchor and a leading edge is provided on the proximal end;
- nonrotatably introducing the bone anchor into bone, with the longitudinal axis of the tine substantially parallel to a longitudinal axis of the bone anchor;
- manipulating the proximal end of the bone anchor to drive the leading edge along a path which inclines radially outwardly from the longitudinal axis of the bone anchor, such that the tine lies along the path.
Dependencies are inferred from the claim text.