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Flexible pedicle screw

A pedicle screw, flexible technology, applied in the field of human implants, can solve the problems of unstable performance, complex structure, high notch, etc., to achieve the effect of reducing occurrence and development, reducing stiffness, and reducing degeneration

Pending Publication Date: 2019-05-14
董谢平
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  • Application Information

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Problems solved by technology

[0003] Because the concept of "dynamic nail" is still being explored and practiced continuously, people have proposed many schemes for making "dynamic nail", such as the patent No. CN 205658962U, titled "a micro-dynamic vertebral arch Although the dynamic nail with a built-in spring can achieve a good clinical medical effect, it has a complex structure, unstable performance, and a high notch; therefore, people have developed an external The dynamic screw with spring, such as the application number 201721481470.X, is called "a pedicle screw with axial buffer and micro-dynamic function". Although the structure is simple and the performance is stable, the notch is still relatively small. high

Method used

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Embodiment Construction

[0022] Using a simple and feasible implementation method can not only retain the advantages of simple structure, easy manufacture, and strong practicability of the uniaxial nail in the "fixed nail", but also achieve the superior clinical effect of the "dynamic nail", while avoiding the " "Dynamic nails" of the "built-in spring" category have disadvantages such as complex structure, unstable performance, and inherent wear and tear caused by the relative swing between the nail seat and the nail body, and can overcome the "high notch" that is clinically tried to avoid. Problems are reduced to an acceptable level, which is the technical solution and specific implementation methods disclosed in the present invention.

[0023] from the attached figure 1 It can be seen from the figure that if the spring 2 shown in the figure is changed into a small section of rigid cylinder, this is the standard uniaxial nail 6 in the "fixed nail" that conforms to the "rigid fixed fusion" theory; Th...

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Abstract

The invention provides a flexible pedicle screw used for bone surgery and neurosurgery. A small section of high-rigidity spring is tied to serve as the neck of the pedicle screw to connect a screw body and a screw base, and the pedicle screw thus can moderately bend in all directions. Spinal segments fixed by the flexible pedicle screw has a better non-fusion fixation effect, stress concentrationof adjacent segments is easily reduced, and degeneration of adjacent segments is prevented.

Description

technical field [0001] The invention relates to a human body implant used in orthopedic surgery and neurosurgery, in particular to a flexible pedicle screw. Background technique [0002] At present, in the field of orthopedic surgery and neurosurgery, the traditional solution for treating intervertebral disc herniation and spinal canal stenosis is to use pedicle screws based on the "rigid fixation and fusion" theory known as the "golden rule". The uniaxial screw with a simple structure and the universal screw that is convenient for clinical use. After the operation, the entire pedicle screw and the implanted vertebral body are connected into a rigid body and fixed together, so they are collectively called "fixation". With the continuous in-depth research of traditional disciplines, people have found that if the vertebral body of the implanted pedicle screw can still swing at a certain angle relative to the connecting rod after the operation is completed, it can support and p...

Claims

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Application Information

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IPC IPC(8): A61B17/70
Inventor 董谢平李青莉何伟义张元维
Owner 董谢平
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