Application of finite element Analysis in dynamic changes of Spinal Mechanics in Osteoporotic Lumbar fracture

Abstract Aim: To explore the effect of finite element biomechanical properties of different methods in the treatment of osteoporotic thoracolumbar fractures. Methods: Based on the ultra-thin CT scan data of a volunteer's thoracolumbar spine, the finite element method was used to simulate the treatment of osteoporotic thoracolumbar fracture. The images of thoracolumbar region were obtained by spiral CT scanning, and the three-dimensional geometric model was obtained by importing Mimics software, the finite element model of normal T 11 ~ L 2 segment was established by finite element software Abaqus, and the validity of the model loading was verified. Based on the finite element model of T 11 vertebral compression fracture based on normal raw data, the clinical overextension reduction manipulation was simulated by different treatment methods, and the changes of stress and displacement in different parts of injured vertebrae were analyzed. Results: In this study, an effective finite element model of T 11 -L 2 segment is established. The maximum stress, axial compression strength, axial compression stiffness (EF) and transverse shear stiffness (GF) of PKP and PVP treatment group were significantly better than those of conservative treatment group and open treatment group, and the difference was statistically significant. There was no significant difference between open treatment group and conservative treatment group, and there was no significant difference between PKP and PVP treatment group. Conclusion: The results of finite element analysis show that PKP and PVP in the treatment of osteoporotic thoracolumbar fractures can effectively improve the condition of patients, relieve their clinical symptoms, have a good prognosis and have a good long-term effect, and its biomechanical properties are good, the application effect is remarkable.