Analytical and finite element models (FEMs) were used to quantify poroelastic material properties for a human intervertebral disk. An axisymmetric FEM based on a poroelastic view of disk constituents was developed for a representative human spinal motion segment (SMS). Creep and steady-state response predicted by FEMs agreed with experimental observations, i.e., long-time creep occurs with flow in the SMS, whereas for rapid steady-state loading an “undrained,” nearly incompressible response is evident. A relatively low value was determined for discal permeability. Transient and long-term creep FE analyses included the study of deformation, pore fluid flow, stress, and pore fluid pressure. Relative fluid motion associated with transient creep is related to nuclear nutrition and the overall mechanical response in the normal disk. Degeneration of the disk may be associated, with an increase in permeability.
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November 1985
Research Papers
Structural Models for Human Spinal Motion Segments Based on a Poroelastic View of the Intervertebral Disk
B. R. Simon,
B. R. Simon
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
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J. S. S. Wu,
J. S. S. Wu
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
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M. W. Carlton,
M. W. Carlton
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
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J. H. Evans,
J. H. Evans
Bioengineering Unit, Strathclyde University, Glasgow, Scotland, U.K.
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L. E. Kazarian
L. E. Kazarian
AFAMRL/BBD, Wright Patterson AFB, Dayton, Ohio 45433
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B. R. Simon
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
J. S. S. Wu
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
M. W. Carlton
Aerospace and Mechanical Engineering, University of Arizona, Tucson, Ariz. 85721
J. H. Evans
Bioengineering Unit, Strathclyde University, Glasgow, Scotland, U.K.
L. E. Kazarian
AFAMRL/BBD, Wright Patterson AFB, Dayton, Ohio 45433
J Biomech Eng. Nov 1985, 107(4): 327-335 (9 pages)
Published Online: November 1, 1985
Article history
Received:
January 2, 1985
Revised:
July 19, 1985
Online:
June 15, 2009
Citation
Simon, B. R., Wu, J. S. S., Carlton, M. W., Evans, J. H., and Kazarian, L. E. (November 1, 1985). "Structural Models for Human Spinal Motion Segments Based on a Poroelastic View of the Intervertebral Disk." ASME. J Biomech Eng. November 1985; 107(4): 327–335. https://doi.org/10.1115/1.3138565
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