Method for constructing three-dimension finite element model which treats tibial plateau posterior-lateral fracture with different inner fixing manners

Abstract

The invention relates to a method for constructing a three-dimension finite element model which treats a tibial plateau posterior-lateral fracture with different inner fixing manners. The method specially includes the following steps that CT tomography is used for obtaining cross-sectional image data of a normal tibia attached outer steel plate and a normal tibia attached rear steel plate; application open source software ITK-SNAP is used for carrying out medical image processing and cutting; a solid geometric model is generated in professional three-dimension finite-element mesh generating software HyperMesh; solid geometric models in different assemblies are selected according to needs in the HyperMEsh and assembled, a needed model containing the whole tibia, a tibial fracture model and a model for treating the tibial fracture with different inner fixing manners are generated, each model is composed of multiple assemblies, each assembly is divided into grids respectively and multiple tetrahedron finite element models which treat the tibial fracture with different inner fixing manners and of the tibia are finally generated. According to the method for constructing the three-dimension finite element model which treats the tibial plateau posterior-lateral fracture with different inner fixing manners, the ITK-SNAP and the HyperMesh software are used for rapidly and accurately setting up the three-dimension finite element model which treats the tibial plateau posterior-lateral fracture with different inner fixing manners, the modeling speed and the modeling quality are greatly improved and a base is laid for further biomechanical analysis.

Description

technical field [0001] The invention relates to a method for building a three-dimensional finite element model of human bone tissue and an internal fixation device, in particular to a method for building a three-dimensional finite element model for treating posterolateral tibial plateau fractures with different internal fixation methods. Background technique [0002] In recent years, with the increase of high-energy injuries, the clinically encountered tibial plateau fractures have become more complex, and traditional treatment concepts and methods cannot solve all problems. Among them, fractures involving the posterolateral side of the tibial plateau are difficult to be classified into the internationally commonly used Schatzker and AO classifications. The lack of clinical understanding and confusing treatment have become an important reason for poor functional recovery after knee fractures, which has attracted the attention of many scholars. [0003] In the treatment of po...

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Problems solved by technology

[0005] The purpose of this invention is to provide a three-dimensional finite element model construction method for the treatment of posterolateral tibial plateau fractures with different internal fixation methods, to solve the problem of using existing CT (Computed Tomography) Scanning cannot obtain three-dimensional space information, the establishment process of different internal fixation methods for tibial fracture models is complicated, and small metals such as screws have artifacts in CT scanning, etc., and accurately establish three-dimensional finite element models for different internal fixation methods for treating posterolateral tibial plateau fractures

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