Bilateral positioning type pedicle screw aimer and preparation method thereof

Abstract

Bilateral positioning type pedicle screw aimer and its preparation method, the preparation method includes the following steps: acquiring medical image data of the target vertebra; reconstructing the three-dimensional model and center point set of the target vertebra; creating a one-time screw insertion to be corrected line; create the secondary screw entry line; determine the diameter of the largest inscribed cylinder of the pedicle along the direction of the secondary screw entry line; determine the value range of the diameter of the pedicle screw and the screw channel; establish a three-dimensional model of the body; manufacture Bilaterally positioned pedicle screw aimer. By adopting the preparation method of the present invention, a bilateral positioning type pedicle screw sighter with high-precision screw setting channels can be manufactured, which is well attached to the target vertebra positioning curved surface. With the aid of the aiming device, the operator can accurately and quickly perform the internal fixation of the pedicle screw, which not only improves the operation efficiency, but also ensures the accuracy and safety of the operation.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a bilateral positioning type pedicle screw aimer and a preparation method thereof. Background technique [0002] The surgical indications for pedicle screw internal fixation are suitable for spinal cord tumors, degenerative diseases, rheumatoid arthritis and infectious diseases, especially in the treatment of spondylolisthesis reduction and correction surgery, transpedicular internal fixation is the The most reliable fixation method. Because pedicle screws can play a three-dimensional fixation role, have the advantages of high mechanical strength, fewer fixation and fusion segments, and better correction of spinal deformity, their clinical application is becoming more and more extensive. [0003] Biomechanical experiments have proved that the ideal clinical effect can only be obtained if the screw is placed along the anatomical long axis of the pedicle and reaches the id...

AI Technical Summary

Problems solved by technology

In recent years, the computer navigation method has been gradually applied in the internal fixation of pedicle screws. It uses real-time pedicle image information of patients to guide the operation, which reduces the risk of surgery and reduces the time for both doctors and patients to be exposed to radiation. It has great advantages. However, navigation equipment is expensive and complicated to operate, and there are still difficulties in clinical popularization

The navigation template method is to manufacture a navigation template based on 3D printing technology, which has the advantages of quick response to surgery and cost-effectiveness. The current individualized navigation template mainly has three problems: first, the template is thin and rigid, which is inconvenient. During the operation, the template is easy to deform and shake when drilling; the second is that the catheter of the navigation template without a sleeve is easy to wear and melt, while the navigation template with a sleeve has a clearance fit between the sleeve and the template and relative rotation , which will affect the orientation accuracy and use effect; the third is that the planning of pedicle screw placement channel lacks effective theoretical and means support, and its optimization method, work efficiency and planning effect need to be improved

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