| As an important bearing part of human body, lumbar vertebra is easy to get damaged. In order to prevent the lumbar vertebra diseases, so it is an efficient means to establish the lumbar vertebra model and analyze the mechanical property. This paper simulated the bone’s mechanical performance by using the latest medical image processing technology and FEA technology. The main work is as follow:(1) Aiming at the present study of bone biomechanical, the difficulty of reestablishing the lumbar model was analyzed, and the solution was worked out.(2) Based on CT images, Mimics software was used to analyze the threshold and mesh, in order to rebuild the 3D model of lumbar. With the previous research experiences about long bones and dry bones, tissue layers of lumbar were separated, and assigned materials, so the complete FEA model of lumbar vertebrae was finally built.(3) Aiming at the complex structure of lumbar, Python language was used to present a parametric modeling method for lumbar. The plug-in, which was created, could meet the need of parametric modeling for lumbar by importing the geometric information and material information.(4) Lumbar vertebra is the main support part of human body, AnyBody software was used to figure out the loads under different actions, which were the data for statics analysis of lumbar vertebra.(5)Through the statics analysis, this paper obtained the stress and deformation displacement of lumbar, and it proved that heavy load can cause stress concentration and large deformation of lumbar, which providing some advices for the prevention of lumbar vertebra diseases.Through rebuilding three-dimensional model and defining the material property, this paper reestablished the complete FEA model of lumbar vertebrae, and this model can represent the real material property. Meanwhile, the parametric modeling method and the research of load actions can meet the requirements of clinical study of lumbar vertebra.
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