The invention provides a posterior minimally invasive screw-rod
system for thoracolumbar vertebral fracture. The posterior minimally invasive screw-rod
system is characterized in that each
pedicle screw is designed to be a long-
tail hollow screw, the far end of the hollow screw is provided with
cancellous bone threads (1), the near end of the hollow screw is provided with
cortical bone threads (2), a screw
tail (3) is U-shaped, and the far end of the screw
tail is provided with a long tail (4); a screw tail self-breaking mark (5) is arranged on the outer side of the joint of the screw tail and the long tail, and the outer side of the long tail is provided with a long-tail plane (6); trapezoidal threads (7) are arranged on the inner sides of the screw tail and the long tail, and square-corner grooves (8) are formed in the trapezoidal threads; the outer side of each
screw cap is provided with top-horizontal trapezoid-shaped convex threads (9), a plum-blossom-shaped groove (10) is formed in the middle of the
screw cap, and is provided with reverse concave threads (11), and the near end of each
screw cap is provided with a U-shaped clamp block (12); each screw cap is connected with the corresponding U-shaped clamp block through a movable embedding manner; each connecting rod is a T-shaped rod, the far end of the connecting rod is provided with a main rod (13), and the near end of the connecting rod is provided with a T-shaped
handle (14); the tail end of the main rod is provided with a conical tip (15), and the near end of the main rod is provided with a positioning sheet (16); the T-shaped
handle is provided with an arc-shaped arm (17); and a connecting rod self-breaking mark (18) is arranged at the joint of the main rod and the arc-shaped arm.