ANTI-TORSION SPINE FIXATION DEVICE
An anti-torsion spine fixation device includes an elongated member spanning from one vertebra to another and connected to each vertebra. The anti-torsion spine fixation device may span more than one vertebral level, but is fixed bilaterally to the most cephalad and caudad vertebrae.
1 . A spinal fixation device comprising:
a first anchor adapted to be attached to a first vertebra;
a second anchor adapted to be attached to the first vertebra,
a third anchor adapted to be attached to a second vertebra;
a first portion of a fixation member coupled to the first and second anchors, the first portion of the fixation member defining a path which approximates an arc between the first and second anchors; and
a second portion of the fixation member coupled to the second and third anchors.
2 . The spinal fixation device of claim 1 , wherein the first and second portions of the fixation member are coupled to their respective anchors by a set-screw.
3 . The spinal fixation device of claim 1 , wherein the first and second portions of the fixation member are coupled to their respective anchors by a taper lock mechanism.
4 . The spinal fixation device of claim 1 , wherein the anchors are disposed on the pedicles of the vertebrae to which they are attached.
5 . The spinal fixation device of claim 1 , wherein the anchors are pedicle screws.
6 . A spinal fixation device comprising:
first and second anchors attachable to a first vertebra;
a third anchor attachable to a second vertebra;
a first portion of a fixation member extending from the first anchor to the second anchor, the first portion defining a first path; and
a second portion of the fixation member extending from the second anchor to the third anchor, the second portion defining a second path, wherein the first path and the second path define an angle therebetween.
7 . The spinal fixation device of claim 6 , wherein the angle is an acute angle.
8 . The spinal fixation device of claim 6 , wherein the fixation members are coupled to their respective anchors by a set-screw.
9 . The spinal fixation device of claim 6 , wherein the fixation members are coupled to their respective anchors by a taper lock mechanism.
10 . The spinal fixation device of claim 6 , wherein the anchors are disposed on the pedicles of the vertebrae to which they are attached.
11 . The spinal fixation device of claim 6 , wherein the anchors are pedicle screws.