Low-cut simple micro-dynamic pedicle screw

Abstract

The invention discloses a pedicle screw with micro-dynamic function applied in an orthopedic surgery and a neurosurgical surgical instrument. The pedicle screw deeply simplifies the structure of the traditional pedicle screw, eliminates the upper and lower pressure blocks, only uses the screw plug, and simultaneously reduces the notch of the nail seat, the ball stud and the spring, so as to retain the clinical function of the original micro-dynamic pedicle screw, simplify the component, save the cost, reduce the notch of the whole pedicle screw in the clinical application, and has the specialeffect of cushioning and automatic reduction.

Description

technical field [0001] The application of the present invention relates to a technique that is gradually becoming popular in orthopedic surgery and neurosurgery. It is applied according to the clinical theory of "maintaining relative micro-dynamic movements can promote the self-healing or re-fusion of adjacent diseased vertebral bodies". Therefore, it is called a medical device of "micro-dynamic pedicle screw". Background technique [0002] In modern orthopedic surgery and neurosurgery, the surgical treatment of lumbar disc herniation and lumbar spinal stenosis has experienced the development of "rigid fixed fusion" to "non-fixed fusion" and then to "micro dynamic fixed fusion". stage; at present, the pedicle screw that is gradually beginning to be clinically approved, developed and applied clinically based on the theory of "micro-dynamic promotion of fusion", is called "micro-dynamic nail", such as the patent number: CN202136405U, the name For the "micro-increment support ...

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Problems solved by technology

[0003] With the continuous clinical exploration and feedback in use, people put forward new requirements for micro-dynamic nails, that is, the structure should be simple, so as to reduce the production cost; the notch should be minimized, so-called "notch" in academics. , can be simply regarded as the height of the nail seat, if the notch is too high, it will seriously affect the effect of the operation. Therefore, some designs try to cancel the upper and lower nails at the expense of the "swing" and "buffering" functions of the micro-dynamic nails Press block and spring, which makes the micro-dynamic nail lose its unique "flexible constraint" effect, which affects the performance of the micro-dynamic nail

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