Establishment And Clinical Application Of Three-dimensional Finite Element Model Of The Human Ankle

Objective: To establish a three-dimensional finite element model of normal human ankle and fractured ankle as a foundation of finite element analysis in this area, and be helpful for clinical diagnosis and treatment. Methods: Normal ankle andfractured ankle in vivo was used as specimen. CT scan was used to obtain configuration, and by applying AutoCAD software three-dimensional coordinate of normal ankle and fractured ankle was obtained. Then by the application of the software of finite element analysts, determining property parameter of material and meshing, we set up an intact three-dimensional finite element model of the normal ankle and the fractured ankle respectively. Results:1) The three-dimensional finite model of normal ankle establishment has the following traits: the geometry shape and reduction of material is ideal, size of mesh can be freely changed to some extent by researchers to meet the demands. 2) The three-dimensional finite model of fractured ankle simulates the alteration of geometry shape of ankle as a result of ankle fracture . The material character and the size rnesh of each part of the fractured ankle can be determined respectively. Conclusion: 1) It is reliable to build three-dimensional finite mode with CT scan data. 2) The method of building model depended on entity is simplier and more efficient than the direct one, and is helpful for the reduction of the diffculty of building the finite element model. 3) The three-dimensional finite model of normal ankle and fractured ankle can accurately simulate proper material character and geometry shape respectively. 4) The establishment of the three-dimensional finite model of normal and abnormal bone , joint and soft tissue will be helpful for the diagnosis and treatment of clinical doctor.