A finite element analysis using biomechanics to simulate the force distribution of intervertebral discs in lumbar spondylosis
Objective To use finite element to analyze the biomechanical effects of lumbar herniated intervertebral discs and analyze their stress characteristics.Methods A middle-aged and elderly male volunteer with intervertebral disc herniation was selected,and a three-dimensional finite element model of the whole lumbar spine(L4～S1)was constructed based on the CT scan results.A downward force of 500N and a front-to-back,left-right,and plane rotation of 10N were applied to the upper surface of L4.m torque,calculate its deformation and stress distribution changes.Results Compared with the relevant literature data,the ROM of the model in the L5～S1 segment decreased by 41.6%～54.9%and 12.9%～33.7%,respectively,and the deformation and stress were the largest in forward flexion,the lowest in posterior extension,and the limitation of forward flexion range of motion was the most obvious.Conclusion The three-dimensional finite element technology was used to successfully simulate the force distribution of the intervertebral disc in lumbar spondylosis,and the analysis and discussion were conducted to provide corresponding reference for clinical diagnosis and treatment.
Lumbar spondylosisIntervertebral discFinite element analysisBiomechanicsRange of motion
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NSTL
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