Cervical pedicle screw feeding guiding formwork and preparation method thereof

Abstract

Provided is a cervical pedicle screw feeding guiding formwork. The formwork surface of the guiding formwork is a profiling faying surface of a spinous process area on a single section cervical vertebra; the back side of the faying surface of the guiding formwork is provided with a handle; corresponding to a spinous process bump of the spinous process area, a limiting through hole penetrates the handle and the guiding formwork, a limiting tail pin is movably installed in the limiting through hole, and the tip of the limiting tail pin is embedded into and penetrates the spinous process bump; corresponding to pedicles on the two sides of the spinous process area, bosses are protruded on the back side of the faying surface of the guiding formwork respectively, the bosses are provided with hollow access through holes, and sleeves are movably installed in the hollow access through holes. The sleeves are medical resin sleeves. The guiding formwork has a sufficient faying area and faying stability, the shaking of the guiding formwork relative to a vertebral plate during an operation is effectively prevented, the pin feeding accuracy can be guaranteed for different patients, and the operation difficulty and the operation risk are lowered. The medical resin sleeves are high in consistency degree with the human tissue, pin feeding guiding for double-side or single-side vertebral body guiding can be achieved.

Description

technical field [0001] The invention relates to the field of surgical medical instruments, in particular to a cervical pedicle screw driving guide device and a preparation method. Background technique [0002] In the reduction and correction of spondylolisthesis, the pedicle positioning technique is the most reliable spinal fixation method. Because the pedicle screw can play a three-dimensional fixation role and has the advantages of high mechanical strength and fixation, its clinical application is becoming more and more extensive. However, the ideal effect can only be obtained if the screw is placed along the anatomical long axis channel of the pedicle and reaches the ideal depth. The anatomical structure around the vertebral body of the spine is complex, the front is adjacent to large blood vessels and viscera, the inner side of the pedicle is the spinal canal, and the lower part is the narrow space formed by the nerve roots, making the placement of pedicle screws diffic...

AI Technical Summary

Problems solved by technology

[0004] (1) Although there are slight differences in the screw entry point and the screw entry angle of various anatomical point marking methods, they have in common that the entry point and direction of the pedicle screw are mainly judged by the operator's experience, mainly relying on the operator's experience. The operator's feel and the exploration of the pedicle probe's positioning channel are used to ensure the accurate placement of the pedicle screw, which requires high requirements for the doctor, and the accuracy is difficult to guarantee;

[0005] (2) Fenestration of the laminae will inevitably increase the operation time and intraoperative blood loss;

[0006] (3) The operation time of the X-ray fluoroscopy-assisted method is longer, and the X-ray radiation dose of patients and medical staff is larger, which causes greater damage to their bodies;

[0009] However, the existing guide device for screw insertion has no fixed structure after placement, and it is easy to shake relative to the human body during the operation, resulting in an error in the direction of screw insertion, and the guide device will generate debris when it rubs against the pedicle screw, which will be introduced into the human body. It is harmful to the human body after being organized, and the guide device is large in size, so the surgical incision surface is large, and there are also a series of problems such as poor adhesion of the device

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