Self-guide long-arm solid percutaneous pedicle screw

Abstract

The invention discloses a self-guide long-arm solid percutaneous pedicle screw which comprises a screw head, a screw body and a screw tail connected in sequence from front to rear. The screw head is a solid cone. The section of the screw head decreases gradually from front to rear. The screw body comprises a solid cylinder front section and solid cone rear section. The front end of the cylinder front section and the rear end of the screw head are in smooth transition. The rear end of the cylinder front section and the front end of the cone rear end are in smooth transition. Outer threads are formed on the outer peripheral wall of the cylinder front section. The screw tail is U-shaped and provided with two fixing arms and a screw seat connecting the two fixing arms. The rear end of the cone rear section is connected with the screw seat. The section of the cone rear section gradually increases from front to rear. The rear-end section of the cone rear section is smaller than the section of the screw seat. The self-guide long-arm solid percutaneous pedicle screw has the advantages accurate percutaneous pedicle screw fixation is achieved, operative wound is reduced, and high mechanical strength of the pedicle screw is guaranteed.

Description

[0001] technical field [0002] The invention relates to a pedicle screw technology for minimally invasive use in the spine, in particular to a self-guiding long-arm solid percutaneous pedicle screw. Background technique [0003] At present, the percutaneous pedicle screws known in China are all hollow pedicle screws. The manufacturing process is complicated, the price is high, and the biomechanical strength is insufficient. They are often cut off or deformed by external forces, and they need to be reamed and implanted under the guidance of a guide pin. . Contents of the invention [0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide self-guiding long-arm solid percutaneous pedicle screws, which can realize accurate placement and fixation of the percutaneous pedicle screws and reduce surgical trauma while ensuring the stability of the pedicles. Nails have high mechanical strength. [0005] The purpose of the p...

AI Technical Summary

Problems solved by technology

[0003] At present, the percutaneous pedicle screws known in China are all hollow pedicle screws. The manufacturing process is complicated, the price is high, and the biomechanical strength is insufficient. They are often cut off or deformed by external forces, and they need to be reamed and implanted under the guidance of a guide pin.

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