Effect of cortical bone modeling methods on biomechanical responses of Chinese 95th percentile pelvis finite element model
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Abstract:
Objective The finite element pelvis model with detailed anatomical structures which meets the Chinese human 95th percentile characteristics was developed , and the influence of cortical bone modeling methods on the biomechanical response of the real pelvis was explored. Methods Based on the pelvis medical images of a 95th percentile male volunteer, the two finite element pelvis models with real hip bone cortical bone thickness and uniform cortical bone thickness(2mm) dominated by hexahedral elements were constructed . Using simulation methods to reconstruct the loading conditions of cadaver experiments, the validation of models is verified by comparing the experimental results and simulation result, and biomechanical response differences of the two models under different working conditions were discussed. Results The simulation data show that there is a strong correlation between the overall biomechanical response of the two pelvic models and the cadaver experiment, and the mechanical response gap between the two models was mostly within 8%, and the correlation score difference between the two models is less than 2%. Conclusions The validation of the two pelvic models established in this paper has been comprehensively verified by rebuilding simulation experiments. Although the biomechanical responses of the two models are different, the difference in the mechanical responses of pelvis model with uniform cortical bone thickness (CON-M) and pelvis model with true cortical bone thickness (REA-M) are small. From the perspective of simplified model, the CON-M model can be used to study the biomechanical response of the pelvis.
