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A design method of personalized interbody cage

An intervertebral cage and a design method technology are applied in the field of personalized intervertebral cage design, which can solve the problem of not realizing functional matching design, and achieve the effects of simple design method, easy clinical promotion, and short operation time.

Inactive Publication Date: 2017-10-10
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

At present, the design of most intervertebral fusion cages is based on geometric matching requirements, and the design based on functional matching has not been realized.

Method used

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  • A design method of personalized interbody cage
  • A design method of personalized interbody cage
  • A design method of personalized interbody cage

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Experimental program
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Effect test

Embodiment

[0039] Example Design of personalized lumbar interbody fusion cage

[0040] The L3-L4 lumbar vertebrae were scanned by spiral CT with scanning parameters: slice thickness 0.63mm, slice distance 0.63mm, tube voltage 120kV, current 225mAs, resolution 512*512pxl, and 150 lumbar CT images were obtained. Import the 150 CT data into the software for median filtering, Gaussian filtering and binarization.

[0041] First, manually select a picture with vertebral body and vertebral arch as the initial slice in the software horizontal view area to start the segmentation process, manually draw the outline of the vertebral body of the initial slice, and then use the level set method to obtain the vertebra of the initial slice through iteration Body precise contour. The subsequent segmentation process will use the reference layer as the starting point to segment all slices from the top and bottom directions.

[0042] Use the cutting function of the software to cut the three-dimensional vertebral...

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Abstract

The invention relates to a method for designing a personalized intervertebral fusion device. In the method, the vertebral body is scanned by CT, and then the CT continuous tomographic image data is reconstructed into a three-dimensional model, and the vertebral body model is measured, including measuring the vertebral body sagittal diameter, vertebral body transverse diameter, intervertebral space height, etc. On the basis of the measured parameters, carry out the personalized design and implantation of the intervertebral fusion device, complete the establishment of the finite element model through mesh division and smoothing, material assignment and boundary condition setting, etc., and finally solve and analyze the finite element model , provide a basis for the optimization and improvement of intervertebral fusion, and finally realize the design of personalized intervertebral fusion considering both geometric matching and functional matching.

Description

Technical field [0001] The invention relates to a method for designing a personalized intervertebral fusion cage, and more specifically to a method for personalized designing an intervertebral fusion cage based on CT image three-dimensional reconstruction and measurement technology and finite element analysis technology. Background technique [0002] In clinical interbody fusion, the implantation method, size, and spatial shape of the intervertebral fusion cage are closely related to nerve damage, implant stability, and the amount of intervertebral bone graft. However, due to the large differences in the physiological parameters of patients and the individual characteristics of the internal environment, it is difficult to optimize the interaction between standardized, batch and serialized intervertebral fusion cages and the human body. Excessive wear, fatigue failure, etc. Therefore, the design of the intervertebral fusion cage must be personalized. The intervertebral fusion ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
Inventor 李淑宇蒲放梁航张明峥李德玉樊瑜波
Owner BEIHANG UNIV