Based On Fresh Bone Ct Images Of Finite Element Analysis And Experimental Verification

The mechanical analysis of complex components in the structure, shape, load and material property can be achieved reliably by finite element analysis, so the FEA has been widely used in the bone biomechanical research. Generally, the living bone couldn't been used for experiment, so at present, both dry bone and cadaver bone are mainly taken into account in the FE simulation ,but it cannot meet the requirement of the clinical orthopaedics treatment. Taking animal bones as a main target, this paper was to simulate the fresh bone's mechanical performance using the latest medical image processing technology and the FEA technology. The main tasks were as follow:(1) Modeling three-dimensional model of the fresh pig femoral skeleton based on CT images. The model was compared with its geometry, and there was high similarity(2) With the former material property assignment experience on the dry bone and the cadaver bone, this paper introduced the gray value ratio coefficientδ, and established the fresh wet skeleton FEA material model based on CT images' grayvalue, the material distribution accorded with the bone anatomical structure.(3) Validated elastic assumptions to the model and simulated its experimental conditions. After that, this paper completed the static analysis by FEA and obtained the measurement point's deformation on surface of the model. In contrast with mechanical compression experiment data, the differences between the both results were small.(4) Randomly selected another fresh pig femoral skeleton, and its model was assigned same parameters with first one and computed using the static FEA, and the result showed that both analysis data and experimental data to the second one were still in line.(5) Selected four different 5 values, and obtained four groups' deformation of the measurement point on the FEM surface. Compared these results and handled its errors, obtained the credible 8 range so as to provide material assignment reference for other fresh wet bones.This FE simulation research on the fresh wet bones had visible improvement in simulation accuracy and precision. Moreover, it will have important significance for living bones' simulation research and fracture simulation in preoperative and postoperative phase.