Abstract:

BACKGROUND: Mechanical and biological factors are main causes for prosthesis loosening, so the stress distribution and implant loosening mechanisms have aroused the attention of scholars.
OBJECTIVE: To analyze mechanical properties of lumbar spine "U"-type flexible mechanical fixation device using finite element analysis.
METHODS: Three-dimensional modeling software of solidworks2008 was used to establish a flexible rod fixation of the entity model, and CosmosWorks tools were used for finite element analysis, respectively, to exert compression, flexion, and tensile and other physical load. The stress distribution of model under different loads elastic fixation device was observed, and each node unit force and displacement situation of fixation rods in the deformation process were observed.
RESULTS AND CONCLUSION: The "U"-type elastic stress distributes within the fixation device in the "U"-type connecting rods of the "U"-type area, and the stress-strain curves show a good elasticity.