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A bone reconstruction principle-based personalized anterior interbody fusion cage design method

A technology of intervertebral fusion device and design method, which is applied in the field of personalized anterior intervertebral fusion device design, which can solve the problems of insufficient strength of the fusion device, settlement of the fusion device, unfavorable fusion, etc., so as to improve the fusion effect, facilitate fusion, and use long life effect

Pending Publication Date: 2019-05-17
国家康复辅具研究中心
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the size of the fusion cage is given, if the contact area between the fusion cage and the vertebral body endplate is too small, the stress on the endplate-cage cage interface will be too high, which will cause the fusion cage to settle or cause the fusion cage to be damaged due to insufficient strength. , which requires that the volume of the solid part be as large as possible in the design to provide sufficient mechanical support; on the contrary, if the contact area between the fusion cage and the vertebral body endplate is too large, there will not be enough space left for filling the graft bone. It is also not conducive to fusion, which requires that the volume of the solid part be as small as possible in order to fill as much bone graft as possible

Method used

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  • A bone reconstruction principle-based personalized anterior interbody fusion cage design method
  • A bone reconstruction principle-based personalized anterior interbody fusion cage design method
  • A bone reconstruction principle-based personalized anterior interbody fusion cage design method

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Embodiment 1

[0034] Example 1. A personalized anterior intervertebral fusion design method based on the principle of bone reconstruction, which consists of Figure 1 to Figure 6 shown, including the following steps:

[0035] A. Vertebral body image acquisition and 3D reconstruction to obtain a 3D vertebral body model;

[0036] B. Establish the initial model of the anterior intervertebral fusion device: measure the geometric characteristics of the three-dimensional vertebral body model, and establish the initial model of the anterior intervertebral fusion device according to the measured geometric characteristic data;

[0037] C. Establish the vertebral body-initial fusion device model: implant the initial model of the anterior intervertebral fusion device into the corresponding position of the three-dimensional vertebral body model to obtain the vertebral body-initial fusion device model;

[0038] D. Establish the finite element model of the vertebral body-initial fusion device: use the ...

Embodiment 2

[0060] Example 2. A personalized anterior intervertebral fusion design method based on the principle of bone reconstruction, which consists of Figure 1 to Figure 6 shown, including the following steps:

[0061] Step 101: Vertebral body image acquisition and 3D reconstruction

[0062] CT scan the patient's lumbar spine, set the slice thickness to 0.63mm, the resolution to 0.39mm×0.39mm, and the image size of each layer to be 512×512 pixels, and then import the original data of the vertebrae obtained from the CT scan into Mimics and other medical image processing In the software, the vertebrae on each CT slice are segmented by manual segmentation, and finally the three-dimensional structures of the upper and lower vertebral bodies that need to be implanted with fusion cages are reconstructed by volume rendering. In this example, two vertebral bodies, L3 and L4, are reconstructed.

[0063] Step 102: Initial Modeling of the Anterior Intervertebral Cage

[0064] In the compute...

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Abstract

The invention discloses a bone reconstruction principle-based personalized anterior interbody fusion cage design method, which comprises the following steps of A, acquiring a vertebral body image andperforming three-dimensional reconstruction to obtain a three-dimensional vertebral body model; B, establishing an initial model of the anterior interbody fusion cage; C, establishing a vertebral body-initial fusion cage model; D, establishing a cone-initial fusion cage finite element model; E, optimizing density distribution of an initial fusion cage finite element model in the cone-initial fusion cage finite element model; updating the material attribute of the anterior interbody fusion cage initial model by adopting a bone reconstruction method to obtain an optimized density distribution cloud picture of the initial fusion cage finite element model; F, shaping to obtain an anterior interbody fusion cage model; and G, estimating the effect of the anterior interbody fusion cage model after the anterior interbody fusion cage model is implanted into the vertebral body. The method not only has the characteristic of improving the strength of the fusion cage, but also has the characteristic of being conveniently fused with a vertebral body.

Description

technical field [0001] The invention relates to a design process of an anterior intervertebral fusion device, in particular to a personalized anterior intervertebral fusion design method based on the principle of bone reconstruction. Background technique [0002] Lumbar interbody fusion is a common procedure in the treatment of degenerative conditions in the spine to stop the motion of the affected segment. During the procedure, the disc is removed and replaced with a fusion cage and bone graft. Intervertebral fusion cages can restore the height of the intervertebral space and stabilize the spine during lumbar interbody fusion, thereby providing a suitable mechanical environment for the fusion of adjacent vertebrae. The existing fusion device generally has a middle part that is a hole that penetrates up and down to fill the graft bone, and a solid part on the periphery to provide mechanical support. At present, most of the fusion devices on the market are standardized fusi...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/20A61F2/44
Inventor 张明峥蒲放任韦燕储照伟莫中军郭俊超樊瑜波
Owner 国家康复辅具研究中心
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