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Personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation

An intervertebral fusion device and topology optimization technology, which is applied in the direction of instruments, calculations, and special data processing applications, can solve the problems that the effect is not necessarily good, and achieve the effect of simple and practical design method, easy clinical promotion, and short operation time

Inactive Publication Date: 2015-03-25
BEIHANG UNIV
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Problems solved by technology

However, fusion cages or placement methods with better mechanical properties in the immediate state may not necessarily produce better results in the long-term postoperative recovery process

Method used

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  • Personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation
  • Personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation
  • Personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation

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Embodiment Construction

[0045] Such as figure 1 As shown, it is a specific implementation flow chart of the design of a personalized intervertebral fusion device according to an embodiment of the present invention, including the following steps:

[0046] Step 101: Image acquisition and preprocessing.

[0047] Perform a spiral CT scan on the vertebrae to obtain vertebral CT images. Import the acquired vertebral original image data into the software and automatically sort and judge the images according to the image numbers. Then the imported CT images were processed by median filtering, Gaussian filtering and binarization.

[0048] Step 102: segmenting the vertebral body image and establishing a three-dimensional model.

[0049] Firstly, an initial slice was manually selected in the horizontal plane view area of ​​the software to start the segmentation process, and the approximate outline of the cone of the initial slice was manually drawn, and then the precise outline of the cone of the initial slice...

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Abstract

The invention relates to a personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation. The method includes the steps of conducting CT / MRI scanning on a vertebral body, segmenting a CT / MRI continuous cross-sectional image of the vertebral body, establishing a three-dimensional model, establishing a finite element model through the substeps of grid dividing and smoothing, material assignment, boundary condition setting, mechanical loading and the like, conducting the topological optimization design on an interbody fusion cage through a density-variable method, and evaluating whether the design is reasonable or not by conducting bony reconstitution numerical analogue simulation on the vertebral body and the cage bone filling area according to the adaptation bony reconstitution theory on the basis of the strain energy density.

Description

technical field [0001] The invention relates to a method for designing a personalized intervertebral fusion device, and more specifically relates to a method for individually designing an intervertebral fusion device based on topology optimization and bone reconstruction simulation evaluation. Background technique [0002] In clinical intervertebral fusion, the implantation method, size, and spatial shape of the intervertebral fusion device are closely related to nerve damage, implantation stability, and intervertebral bone graft volume. 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, mass-produced, and serialized intervertebral fusion devices and the human body, resulting in some intervertebral fusion devices entering the body. Excessive wear, fatigue failure, etc. Therefore, the design of intervertebral fusion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 蒲放张琳琳张明峥姚杰王豫樊瑜波
Owner BEIHANG UNIV
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