Pedicle screw implantation method

Abstract

The invention discloses a pedicle screw implantation method. The pedicle screw implantation method comprises the following steps of 1) assembling an angle control tool; 2) printing a guide plate and a vertebral body 3D model; and 3) implanting a screw by combining an angle control combined pedicle screw implantation tool with the guide plate, clinging the guide plate to the rear edge of a pedicle, adjusting two mutually vertical angle gauges to enable the numerical values on the angle gauges to be the same as CT measurement numerical values of a preoperative vertebral body, and opening along a guide plate hole and opening a path to establish a screw path; and then removing the guide plate, and implanting the pedicle screw. The problems that in the pedicle screw implantation process, a screw feeding point is difficult to determine, and the controllability of the screw feeding direction is poor are solved; the screw implantation accuracy is improved, the operation time is shortened, the ray exposure of an operator and a patient in the operation is reduced, and the injury risks of nerves, blood vessels, spinal cord and the like are reduced; and the operation cost is reduced, the nail implantation difficulty of an operator is reduced, and wide development of medical units at all levels such as cities and counties is facilitated.

Description

technical field [0001] The invention belongs to the medical field, in particular to a pedicle screw implantation method. Background technique [0002] Pedicle screws have been recognized by spinal surgeons all over the world for their superior biomechanical performance, and are widely used in the treatment of various spinal diseases such as trauma, deformity, tuberculosis, tumor, and degeneration [1]. However, if the position of the screw is not good, it will inevitably affect its biomechanical effect, and in severe cases, it may even damage blood vessels, nerves, spinal cord, etc., leading to disastrous consequences [2-3]. Therefore, how to improve the accuracy of screw implantation has always been the focus of research in the field of spinal surgery. [0003] At present, the commonly used pedicle screw implantation methods mainly include: freehand screw placement under C-arm fluoroscopy, computer navigation technology, and 3D printing navigation template technology [4]. ...

AI Technical Summary

Problems solved by technology

Manual nail placement under C-arm fluoroscopy is the most commonly used method at present, and its accuracy rate of nail placement is also high[5]. ②During the operation of the C-arm, the angular position of the C-arm is shifted, the patient’s body position cannot be completely neutral and symmetrical, or the patient moves on the position stand during the operation, which will affect the imaging effect of the pedicle. The pedicle image is deformed, which is different from the real pedicle image

However, when the screw is implanted, the operator often refers to the intraoperative image to place the screw, and then the screw placement deviation occurs; ③ it is easily affected by the experience of the operator and the intraoperative state, and the learning curve is long

Computer navigation technology provides real-time monitoring for pedicle screw implantation. Although it improves the accuracy of pedicle screw implantation[7-9], its disadvantages are: ①The navigation equipment is expensive, and the learning curve is relatively long, making it difficult to Carried out on a larger scale in the short term; ② prolongs the operation time and increases the risk of patients during operation

The 3D printing navigation template technology is based on the "reverse engineering principle" and "rapid prototyping technology" to obtain the navigation template containing the nail placement channel [10], and then assist the nail placement, which is a research hotspot in recent years, but it has been found in clinical practice [ 11] are: ① In patients with severe degeneration, it is difficult to fit the guide plate and the vertebral body or the stability is poor after fitting; ② When the surgeon implants the screw along the navigation channel, the controllability of the screw implantation direction is poor, which affects the stability of the screw implantation. accuracy

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