Pedicle-based intradiscal fixation devices and methods
Pedicle-based intradiscal fixation devices, systems, instruments, and methods thereof. An implant for stabilizing an inferior vertebra and a superior vertebra may include a first member and a second member moveably connected to the first member. The implant may have a first, initial insertion orientation and a second, final implantation orientation different from the first, initial insertion orientation. The first member may be configured to be inserted through a pedicle of the inferior vertebra and the second member may be configured to engage bone of the superior vertebra in the second, final implantation orientation.
1 . An implant for stabilizing an inferior vertebra and a superior vertebra, the implant comprising:
a screw portion and an anchor portion moveably coupled to the screw portion, wherein the implant has a collapsed position whereby the anchor portion is positioned in line with the screw portion, and the implant has an extended position whereby the anchor portion is extended away from the screw portion,
a rod portion receivable in the screw portion, and
a push rod connected to a distal end of the screw portion by a first pin and connected to the anchor portion by a second pin, wherein when the screw portion moves forward along the rod portion, the push rod pushes forward and slides the anchor portion outward into the extended position,
wherein the screw portion is configured to be inserted through a pedicle of the inferior vertebra in the collapsed position, and the anchor portion is configured to engage bone of the superior vertebra in the extended position.
2 . The implant of claim 1 , wherein the rod portion includes one or more tracks configured to mate with corresponding tracks along the anchor portion, thereby facilitating movement of the anchor portion.