Vertebra pedical nail of thoracolumbar vertebral fracture posterior minimally-invasive screw-rod system

The invention provides a vertebra pedical nail of a thoracolumbar vertebral fracture posterior minimally-invasive screw-rod system. The vertebra pedical nail is characterized in that the vertebra pedical nail is a long-tail hollow nail; the far end of the hollow nail is provided with a cancellous bone thread (1) and the near end of the hollow nail is provided with a cortical bone thread (2); a nail tail (3) is designed to be a U shape; the far end of the nail tail is provided with a long tail (4); a nail tail self-shearing mark (5) is arranged at the outer side of the connection part of the nail tail and the long tail; the outer side of the long tail is provided with a long-tail plane (6); trapezoid threads (7) are arranged at the inner sides of the nail tail and the long tail; square-corner grooves (8) are formed in the trapezoid threads. The sizes of the system parts are as follows: the diameter of the far end of the hollow nail is 3.0mm to 7.0mm and the diameter of the near end of the hollow nail is gradually increased; the length of the nail is 25mm to 60mm, the diameter of the nail tail is 10mm to 20mm and the length of the nail tail is 10mm to 20mm; the width of the U shape is 6mm to 8mm and the length of the long tail is 30mm to 50mm; the distance of the long-tail plane is 12mm to 18mm. The diameters of the trapezoid threads of the long tail and the nail tail are the same. The square-corner grooves are 6mm to 16mm long and 4mm to 8mm wide. The long-tail hollow nail is provided with a single-direction long-tail nail or a universal long-tail nail. The trapezoid threads are arranged at the inner sides of the nail tail and the long tail, and the square-corner grooves or square-corner-free grooves are formed in the inner sides of the trapezoid threads.