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US 2008/0077155 A1Published application
System and method for displacement of bony structures
OwnerJennifer Diederich, Dennis Colleran +1inventors
InventorsJennifer Diederich, Dennis Colleran, Noelle Dye
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Abstract
Disclosed are various embodiments of a displacement device having at least a first arm, a second arm, and a connector. Various embodiments of the connector includes a lateral adjustment mechanism for adjusting the distance between the first arm and the second arm and an angular adjustment mechanism for adjusting the angle between the first arm and the second arm.
Claims22
A device for adjusting the distance between bony structures comprising:
- a first arm having a longitudinal axis, a proximal end portion and a distal end portion, the distal end portion adapted to couple to a pedicle screw head and having a cutout adapted to accommodate at least a portion of a rod;
- a second arm having a longitudinal axis, a proximal end portion and a distal end portion, the distal end portion adapted to couple to a pedicle screw head and having a cutout adapted to accommodate at least a portion of a rod;
- and
- a connector coupling the proximal end portion of the first arm to the proximal end portion of the second arm, the connector having:
- an L-shaped connector having a connector bar positioned substantially transverse to the longitudinal axis of the first arm, the connector bar slidingly coupled to the proximal end portion of the first arm and pivotally coupled to the proximal end portion of the second arm;
- a lateral adjustment mechanism coupled to the first arm and to the second arm, wherein the lateral adjustment mechanism adjusts the distance between the first arm and second arm;
- and
- an angular adjustment mechanism coupled to the proximal end portion of the second arm and the connector bar for adjusting an angle between the longitudinal axis of the second arm relative to the connector bar.
5 more elements
A method for adjusting the distance between bony structures comprising:
- providing a displacement device having a first arm, a second arm, and an angular adjustment mechanism, a distance advancing mechanism, and a connecting bar connecting the first arm to the second arm in a tongue-in-groove sliding relationship,
- unlocking an angular adjustment mechanism of a displacement device;
- adjusting angular adjustment mechanism to adjust the angle of the second arm of the displacement device relative to a first arm of the displacement device;
- coupling a first arm of the displacement device to a first bone anchor;
- coupling a second arm of the displacement device to a second bone anchor;
- locking the angular adjustment mechanism after coupling the first and second arms to the first and second anchors;
- moving the distance advancing mechanism such that the first arm slides relative to the connecting bar along a longitudinal axis of the connecting bar such that the distance between the first arm and the second arm is adjusted.
4 more elements
A surgical instrument for adjusting distances between bony structures, the surgical instrument comprising:
- a first guide tube;
- a second guide tube;
- and
- a connector having:
- an L-shaped connector bar coupling the first guide tube to the second guide tube wherein the L-shaped connector bar is pivotally coupled to the second guide tube and slidingly coupled to the first guide tube;
- a lateral adjustment means for adjusting a lateral distance between the first and second guide tubes;
- an angular adjustment means for adjusting an angular position between the second guide tube and the connector bar;
- and
- an angular fixation means for angularly locking the second guide tube relative to the connector bar.
6 more elements
A surgical system for adjusting the distance between two bony structures, comprising:
- a first and second anchor assembly, each assembly having a bone anchor and a head;
- a first extension adapted to coupled to the first pedicle screw assembly;
- a second extension adapted to coupled to the second pedicle screw assembly;
- and
- a displacement device having:
- a first guide tube adapted to slide over the first extension;
- a second guide tube adapted to slide over the second extension;
- and
- a connector having:
- an L-shaped connector bar slidingly coupled to the first guide tube and pivotally coupled to the second guide tube;
- a lateral adjustment mechanism coupling the first guide tube to the second guide tube, wherein the lateral adjustment mechanism adjusts the distance between the first guide tube and second guide tube;
- and
- an angular adjustment mechanism coupled to the second guide tube and the connector bar, wherein the second guide tube is angularly adjustable relative to the connector bar.
10 more elements
Dependencies are inferred from the claim text.