Vertebral pedicle screw

Abstract

The invention discloses a vertebral pedicle screw, comprising a screw tail and a screw body, a spherical mortar cup is arranged on the screw tail, a spherical mortar body is arranged at the rear end of the screw body, the mortar body is arranged in the mortar cup and is matched with the mortar cup in a sliding way, and a limit part for limiting the screw body is arranged at the front end of the screw tail; by adopting the vertebral pedicle screw, a patient has better physiological function, and regression of the corresponding intervertebral disk of an operation section and the adjacent intervertebral disk is reduced to the maximum extent, so as to improve the short-term and long-term operative effect; in addition, the vertebral pedicle screw has low manufacturing cost and strong popularity.

Description

technical field [0001] The invention relates to a medical appliance, in particular to a pedicle screw. Background technique [0002] Pedicle screws are relatively common in spinal surgery, and their function is to connect and fix two or more vertebrae, and to fix, restore height, and correct the spine of spinal patients. [0003] However, once the existing pedicle screws are fixed and locked, they are immobile, that is to say, after the operation is completed, the pedicle screws are completely fixed to the spine, and two or more pedicle screws pass through the connecting rod. Connection, so that relative movement cannot occur between two adjacent vertebrae, and bending and rotation cannot be performed between adjacent vertebrae. The existing pedicle screws have the following defects: [0004] 1. It does not conform to the physiological structure of the spine, and the mobility of the patient's spine is greatly reduced after surgery; [0005] 2. The vertebrae where the pedic...

AI Technical Summary

Problems solved by technology

[0003] However, once the existing pedicle screws are fixed and locked, they are immobile, that is to say, after the operation is completed, the pedicle screws are completely fixed to the spine, and two or more pedicle screws pass through the connecting rod. Connection, so that relative movement cannot occur between two adjacent vertebrae, and bending and rotation cannot be performed between adjacent vertebrae. The existing pedicle screws have the following defects:

[0004] 1. It does not conform to the physiological structure of the spine, and the mobility of the patient's spine is greatly reduced after surgery;

[0005] 2. The vertebrae where the pedicle screws are installed cannot move relative to each other. After a long time, it will easily lead to degeneration of the corresponding segment and its adjacent intervertebral disc, which will affect the long-term effect of the operation

[0008] 2. The fretting segments of the improved connecting rod are limited;

[0009] 3. The improved connecting rod requires high surgical operation skills, which greatly increases the difficulty of surgery, and often the surgical effect is not good

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