Method for utilizing three-dimensional modeling for looking for optimum inserting point for inserting pedicle screw

Abstract

The invention discloses a method for utilizing three-dimensional modeling for looking for an optimum inserting point for inserting a pedicle screw. The method comprises the steps that firstly, an optimum channel plane for inserting the pedicle screw is determined, then an optimum safety channel for inserting the pedicle screw is determined, and finally the optimum inserting point for inserting the pedicle screw is determined. The inserting point is located through the method, a patient does not need to be in contact with X-rays, trauma is reduced, operation time is saved, and no matter whether the vertebral pedicle and the zygopophysis of the centrum of the patient are varied or varied to a certain degree, the accuracy and success rate of inserting the pedicle screw at one time are high.

Description

technical field [0001] The invention relates to the field of spinal surgery, in particular to a method for finding the best entry point for placing pedicle screws by using three-dimensional modeling. Background technique [0002] For various diseases and fractures of the spine, pedicle screws need to be used to rebuild the stability of the spine during surgery. The application of pedicle screws in spinal surgery is becoming popular, and the commonly used insertion methods include anatomical landmark positioning and freehand insertion. , C-arm fluoroscopy, etc. These methods have their own advantages and disadvantages, and some have serious complications, such as spinal nerve injury causing dysfunction of lower limbs and defecation, large blood vessel injury endangering the patient's life, and cancer occurrence due to X-ray damage. Improving the accuracy of pedicle screw placement and the success rate of one-time placement has always been the goal pursued by the field of spin...

AI Technical Summary

Problems solved by technology

[0009] 1. Variation of the articular process: hyperplasia, hypertrophy, and cohesion often occur in the superior articular process and accessory process where the pedicle screw entry point is located, resulting in the disappearance of the normal shape and the disappearance of the joint space of the articular facet. When normal anatomical landmarks are found, the entry point cannot be found at one time or accurately. It is often necessary to enlarge and expose the transverse process, and use the transverse process as a comparison to determine the entry point. While increasing trauma and operation time, there is still a high failure rate

[0010] 2. The pedicle often has many variations, such as the diameter of the pedicle becomes smaller or even the medullary cavity disappears, the inclination angle of the pedicle on the axial plane can become larger or smaller, and the inclination of the pedicle toward the head side on the coronal plane The angle can be enlarged (the pedicles on both sides are in a figure of eight) or narrowed (the pedicles on both sides are parallel). The small exclamation point shape, the same I-shape, round shape, etc. These pedicles and entry points vary, often resulting in repeated search for entry points, multiple punctures, puncture of the pedicle screw channel, and decreased screw holding force , and may cause serious complications of spinal nerve and blood vessel damage, and even endanger the patient's life

[0011] Due to the free-hand insertion method after anatomical landmark positioning, it often fails due to the variation of the pedicle itself and the variation of the articular process. Therefore, the pedicle can only be placed under the guidance of C-arm X-ray fluoroscopy in order to improve its accuracy. The disadvantage is that both doctors and patients will be damaged by X-rays to the human body, especially medical staff who are damaged by X-rays for a long time can cause various cancers to occur

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