Effects of Different Isotropic Material Assignment on Human Tibia Stress Analysis

Finite element analysis (FEA) has been adopted as a powerful tool for analyzing the mechanical behavior of human bones under various conditions. However, the appropriate segmentation and material property assignment methods for use in FEA remain a topic of debate. In this study, we compare the effects of three different segmentation and material assignment approaches on the stress distribution of the human tibia. CT images were utilized to create a ۳D model of the bone, followed by static stress analysis using FEA. The analyses were performed under the following conditions: (۱) the entire bone was considered as a uniform layer with homogeneous and isotropic material properties, (۲) both cortical and trabecular layers of the bone were segmented and had distinct homogeneous material properties, (۳) the properties of the cortical layer remains the same as the previous condition, while location-based isotropic material properties were assigned to the trabecular layer to incorporate the effects of its porosity. The results revealed that the maximum stress for the first two models was near, by ۱۲.۹۱ and ۱۱.۹۰ MPa, while it was ۹.۸۳ MPa for the third model. These results provide us insights on the development of biomechanical models used for orthopedic simulations or clinical use.

کلیدواژه ها:

Tibia bone ، finite element ، bone stress analysis ، tibia bone material assignment