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Production method of navigation template for positioning the pediculus arcus vertebrae

A technology of navigation templates and production methods, applied in special data processing applications, medical science, instruments, etc., can solve problems such as great difficulties and unimaginable consequences, and achieve the effect of reducing pain, reducing waste of resources, and reducing operation time

Inactive Publication Date: 2009-03-25
陆声
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of this technology to pedicle fixation. In addition, in pedicle fixation, even if the patient's pedicle model is made with the above-mentioned technology before operation, and the direction of screw insertion is determined. In the simulation test with the depth, due to the change of the patient's position during the operation, it is very difficult to accurately find the original simulated screw insertion direction and insert the pedicle screw. Once there is an error, the consequences will be disastrous

Method used

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  • Production method of navigation template for positioning the pediculus arcus vertebrae
  • Production method of navigation template for positioning the pediculus arcus vertebrae
  • Production method of navigation template for positioning the pediculus arcus vertebrae

Examples

Experimental program
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Effect test

Embodiment 1

[0015] 1. Raw data collection: Before the operation, a thin-section CT scan is performed on the vertebrae in the surgical area of ​​the patient, and the raw CT data are collected.

[0016] 2. Establishment of the 3D model of the vertebrae: import CT continuous tomographic image data into the 3D reconstruction software, firstly extract the vertebral boundary contour information area by gray-scale segmentation, and then apply the area segmentation to extract the vertebral information area again, adopt the default optimal reconstruction mode of the system, and establish The 3D reconstruction of the vertebral body model can be exported in STL format. Use single vertebral body reconstruction for the vertebral body that needs to be positioned, as shown in the attached figure 1 , where pedicle 1 is the site that needs to be focused on.

[0017] 3. Three-dimensional analysis of the pedicle screwing channel: Open the three-dimensional reconstruction model on the UG Imageware12.0 platf...

Embodiment 2

[0023] 1. Raw data collection: Before the operation, a thin-section CT scan is performed on the vertebrae in the surgical area of ​​the patient, and the raw CT data are collected.

[0024] 2. Establishment of the 3D model of the vertebrae: import CT continuous tomographic image data into the 3D reconstruction software, firstly extract the vertebral boundary contour information area by gray-scale segmentation, and then apply the area segmentation to extract the vertebral information area again, adopt the default optimal reconstruction mode of the system, and establish The 3D reconstruction of the vertebral body model can be exported in STL format. A single vertebral body reconstruction is used for the vertebral body that needs to be positioned.

[0025] 3. Establishment of the physical model of the vertebrae: use laser rapid prototyping technology to establish the physical model of the vertebral body based on the three-dimensionally reconstructed vertebral body model on the com...

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Abstract

The invention relates to a method for fabricating a navigation templet used in pedicle positioning, including the following steps: firstly, collecting the original data and building up a three-dimensional vertebra model; wherein focusing on the location of a pedicle (1); then, conducting three-dimensional analysis to a screw entry passage of the pedicle and building up a virtual screw entry templet(3) which includes the screw entry passage(2); wherein the screw entry templet(3) is a reverse navigation templet which matches with the outline of the rear part of a vertebral lamina; and then, fabricating the reverse navigation templet through quick molding technique. The increases of CT or MRI scanning velocity and precision provide a precise sectional image for acquiring a three-dimensional model in reverse engineering, and the necessary organs can be quickly reconstructed through a three-dimensional reconstruction software and can be transformed and bored freely on the virtual model so as to figure out an optimal pedicle screw entry route. On the basis of the virtual model, the pedicle screw entry direction and depth can be guided by using the reverse navigation templet fabricated through quick molding technique during an operation so as to quickly and accurately finish the operation.

Description

technical field [0001] The invention relates to a method for making a positioning and navigation template for surgery, in particular to a method for making a navigation template that can be used for pedicle positioning. Background technique [0002] In orthopedic operations such as spinal trauma reduction and deformity correction, it is generally believed that internal fixation with pedicle screws is the most stable spinal fixation method. However, since the diameter of the pedicles of the thoracic and cervical spine gradually decreases from the lumbar spine up, the difficulty and risk of pedicle screw fixation gradually increase, and mistakes may cause great damage. The pedicle technology of the thoracic and cervical spine Difficult to popularize clinically. [0003] Therefore, people began to look for a spinal navigation system capable of accurate positioning, so as to accurately locate the pedicle and ensure the smooth progress of the operation. The use of computer navi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/90G06F17/50
CPCA61B17/1757A61B2017/568
Inventor 陆声
Owner 陆声
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