Three-Dimensional Finite Element Analysis of Lumbar Vertebrae (Compared with 3D-CT at the Pars Interarticularis).:Compared with 3D-CT at the Pars Interarticularis

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This study was done clarify the biomechanical factors causing spondylolysis using a three-dim ensional finite element method and 3D-CT.The geometry of the finite element model is based on the L5 posterior element of a 29-year-old man.Simulated loads were applied to the surface of the superior and the inferior facets vertically.Stress distribution results indicate that there were high stresses in the pars interarticularis, especially the ventral cortical bone. The results of finite element studies and the general lesion of spondylolysis were in agreement, and were confirmed with 3D-CT.It is sugested that stress is an important factor in the etiology of spondyloloysis and that 3D-CT is a valuable tool in diagnising the incipient stage of this disorder.
西日本整形・災害外科学会の論文