Three-dimensional finite element constructing method based on medical image data LISS-DF to cure distal femur fracture

Abstract

The invention discloses a three-dimensional finite element constructing method based on medical image data LISS-DF to cure distal femur fracture. CT tomography is utilized to obtain the tomographic image data of an LISS steel plate and the tomographic image data of the normal sheep femur, three-dimensional medical images are divided, outline characteristic points of the three-dimensional medical images are extracted out, data are output, a surface geometrical model is initially constructed, a three-dimensional solid geometrical model is constructed, a solid geometrical model generated based on the medical images is established, the geometrical model generated based on the medical images is edited, a screw solid geometrical model generated based on the screw setting principle is established, a three-dimensional finite element model is constructed, and finally a plurality of three pyramid finite element models are generated to cure femoral fracture through different combined fixing methods between the sheep femur and near-end screws. The constructing method can form the three-dimensional finite element model containing the complete sheep femur, the distal femur fracture and the LISS-DF steel plate and the three-dimension finite element model providing the different combined fixing method for the single cortex and double cortexes of the near-end screws of the steel plate to cure the distal femur fracture. The constructing method can quickly and accurately construct the three-dimensional finite element model to cure the distal femur fracture through different combined fixing methods of the single cortex and the double cortexes of the near-end screws of the LISS-DF steel plate. Thus, the model constructing speed and the model quality are greatly improved.

Description

technical field [0001] The invention relates to a method for constructing a three-dimensional finite element model of sheep bone tissue and an internal fixation device, in particular to a method for constructing a three-dimensional finite element model for treating distal femur fractures based on medical image data LISS-DF. Background technique [0002] With the rapid development of my country's transportation and construction industry, the number of distal femur fractures caused by high-energy violent trauma such as traffic accidents, high-altitude falls, and heavy objects has increased sharply in recent years. The lower limb trauma of this disease is more serious and complicated. It is more difficult, so the clinical treatment is more difficult, the curative effect is poor, and even lead to limb shortening and knee joint dysfunction. [0003] Since distal femoral fractures are mostly comminuted and unstable fractures caused by high-energy injuries, and often involve joints,...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for constructing a three-dimensional finite element model for the treatment of distal femur fractures based on medical image data LISS-DF, which solves the problem of using existing CT ( Computed Tomography) scanning cannot obtain three-dimensional space information, the process of establishing a distal femur fracture model with different combinations of screws is complicated, and it is difficult to register the position of the plate, screw and femur. Three-dimensional finite element model of combined fixation in the treatment of distal femoral fractures

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