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Total knee joint finite element modeling method

A technology of a total knee joint and modeling method, applied in the field of finite element modeling of the total knee joint, can solve problems such as complex structure, achieve the effects of high modeling efficiency, reduce joint damage, and improve the awareness of protecting the knee joint

Pending Publication Date: 2019-11-12
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

It has a complex structure and comprehensive motor functions, but it is also an injury-prone site, commonly seen in industrial production, traffic accidents and sports injuries

Method used

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  • Total knee joint finite element modeling method
  • Total knee joint finite element modeling method
  • Total knee joint finite element modeling method

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Embodiment 1

[0030] The invention provides a finite element modeling method of the whole knee joint, specifically as figure 1 shown, including the following steps:

[0031] Step 1, collecting knee joint data; specifically, in step 1 of this embodiment, the knee joint of a healthy human body is scanned by CT to obtain knee joint data;

[0032] Step 2, import the collected data file into Mimics software and open it, then define the direction, and determine the images of the coronal plane, cross section, and sagittal plane respectively; specifically, the CT scanning results in step 2 of the present embodiment are in the form of DICOM files Import the Mimics software after format output, and use the New Project Wizard command to open the DICOM file;

[0033] Step 3. Use the Profile Line tool in the Mimics software to divide the required bone tissue on the sagittal or coronal plane, and an interval value will be displayed on the pop-up interface;

[0034] Step 4, use the threshold setting too...

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Abstract

The invention provides a total knee joint finite element modeling method, and belongs to the technical field of joint modeling. The method comprises the steps of collecting knee joint data; opening the data file and determining images of a coronal plane, a cross section and a sagittal plane; dividing the required bone tissue on the sagittal plane or the coronal plane; obtaining a three-dimensionalmodel of the bone tissue; obtaining a three-dimensional model of the soft tissue; registering the three-dimensional model of the bone tissue and the three-dimensional model of the soft tissue to obtain a total knee joint model; deleting messy structural surfaces in the total knee joint model; simplifying triangular patches, removing nails, repairing, relaxing, parameterizing curved surfaces and accurately curved surfaces of the knee joints, and finally storing the curved surfaces as IGS files to complete establishment of a three-dimensional finite element model of the total knee joints. The method is high in modeling efficiency, can solve the problem of extraction of the knee joint model, analyzes the stress behavior of the knee joint through numerical simulation, and is beneficial to knee joint protection, rehabilitation and prosthesis design and optimization.

Description

technical field [0001] The invention belongs to the technical field of joint modeling, and in particular relates to a finite element modeling method of the whole knee joint. Background technique [0002] The knee joint is composed of bone tissues such as the tibia, patella, and femur, and soft tissues such as the meniscus, ligaments, and cartilage. It has a complex structure and comprehensive motor functions, but it is also an injury-prone site, commonly seen in industrial production, traffic accidents and sports injuries. Bone disease affects 90% of women and 80% of men over the age of 65. At present, there are great limitations in the study of the injury mechanism of the knee joint, and the main methods used are experiment and numerical simulation. But the cost is high, the difference between in vitro and in vivo conditions is large, the conditions are difficult to control, it is difficult to obtain the stress distribution of bone tissue and cartilage tissue, and the sou...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00G06T19/20
CPCG06T17/00G06T19/20
Inventor 韩冰刘更王旭鹏王亚静张力高静袁建平
Owner NORTHWESTERN POLYTECHNICAL UNIV
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