Journal ArticleDOI
Mechanical analysis of the lumbar vertebrae in a three-dimensional finite element method model in which intradiscal pressure in the nucleus pulposus was used to establish the model.
Keisuke Goto,Naoya Tajima,Etsuo Chosa,Koji Totoribe,Hiroshi Kuroki,Yuichi Arizumi,Takashi Arai +6 more
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TLDR
A three-dimensional finite element method (FEM) model of the 4th and 5th vertebrae is established, using computed tomography images (2-mm slice thickness) of a healthy 29-year-old man and von Mises stress on the vertebral endplates and the annulus fibrosus is examined.About:
This article is published in Journal of Orthopaedic Science.The article was published on 2002-03-01. It has received 74 citations till now. The article focuses on the topics: von Mises yield criterion & Intervertebral disk.read more
Citations
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Journal ArticleDOI
Analysis of the influence of disc degeneration on the mechanical behaviour of a lumbar motion segment using the finite element method.
Antonius Rohlmann,Thomas Zander,Hendrik Schmidt,Hendrik Schmidt,Hans-Joachim Wilke,Georg Bergmann +5 more
TL;DR: Three-dimensional, nonlinear finite element model of the L3/L4 functional unit was used to study the influence of disc degeneration on motion segment mechanics and found that a mildly degenerated disc increases intersegmental rotation for all loading cases.
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Effects of lumbar spinal fusion on the other lumbar intervertebral levels (three-dimensional finite element analysis)
Keisuke Goto,Naoya Tajima,Etsuo Chosa,Koji Totoribe,Shinichiro Kubo,Hiroshi Kuroki,Takashi Arai +6 more
TL;DR: It is demonstrated that with lumbar fusion, stresses on the vertebral end-plate and the annulus fibrosus were high adjacent to the fusion level; furthermore, stresses were higher in the PLIF model than in the intact model.
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Biomechanical analysis of the lumbar spine on facet joint force and intradiscal pressure - a finite element study
Ching Sung Kuo,Hsuan Teh Hu,Ruey Mo Lin,Kuo Yuan Huang,Po Chun Lin,Zheng Cheng Zhong,Mu Lin Hseih +6 more
TL;DR: The results revealed that asymmetric responses of the facet joint forces exist in various postures and that such effect is amplified with larger loadings.
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Stepwise reduction of functional spinal structures increase vertebral translation and intradiscal pressure.
TL;DR: Results provided by these studies may be used as a database for researchers aiming to calibrate or validate finite element models of L4-5 segments and intradiscal pressure correlated well with data of range of motion for rotation.
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An accurate validation of a computational model of a human lumbosacral segment
TL;DR: An accurate computational model is developed to simulate the bio-mechanical response of the whole lumbosacral spinal unit (L1-S1) under physiological loadings and constraint conditions and can be clinically correlated with the existence of damage exactly where the stresses were maximal in the proposed finite element model.
References
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Book
Clinical Biomechanics of the Spine
TL;DR: Combining orthopedic surgery with biomechanical engineering, this reference and teaching text reviews and analyzes the clinical and scientific data on the mechanics of the human spine.
Journal ArticleDOI
In vivo intradiscal pressure measurement in healthy individuals and in patients with ongoing back problems.
TL;DR: The spinal load was highly dependent on the angle of the motion segment in normal discs in vivo and the intradiscal pressure in degenerated discs was significantly reduced compared with that of normal discs.
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Discs degenerate before facets.
TL;DR: It is concluded that disc degeneration occurs before facet joint osteoarthritis, which may be secondary to mechanical changes in the loading of the facet joints.
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A finite element study of a lumbar motion segment subjected to pure sagittal plane moments.
TL;DR: A nonlinear finite element program has been developed and applied to the analysis of a three-dimensional model of the lumbar L2-3 motion segment subjected to sagittal plane moments and results indicate that the load transfer path through the posterior elements of the joint in flexion is different from that in extension.