Personalized pedicle screw drilling template with quick-change drill sleeve and its preparation method

Abstract

A personalized pedicle screw drilling mold with quick-change drill sleeves and a preparation method thereof. The personalized pedicle screw drilling mold includes a body and a drill sleeve; There is a nailing plane, and there are finger pressure pits on the front and rear side walls. There are two nailing channels in the body. One end of the nailing channel is connected to the nailing plane, and the other end is connected to the bottom surface; the drill sleeve is installed in the nailing channel. , they form a transition fit. The advantage of the present invention is that the structural size and the bone-fitting surface of the body are designed according to the shape and size of the target vertebra and the positional relationship with adjacent vertebrae, which has obvious characteristics of personalized customization. Drill the threaded bottom hole of the pedicle screw through the drill sleeve, and then implant the pedicle screw, which can not only ensure that the pedicle cortex is not pierced, but also ensure that the screw has a larger diameter within the range allowed by the pedicle space. Diameter, so as to ensure a firm three-dimensional fixation effect after implantation to the greatest extent, and realize the reproduction of the biomechanical characteristics of the vertebral joint.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a personalized pedicle screw drill template with a quick-change drill sleeve 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 th...

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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