Deformation of the Vertebral End-plate Under Axial Loading of the Spine

Brinckmann, Paul; Frobin, Wolfgang; Hierholzer, E.; M, Horst

doi:10.1097/00007632-198311000-00007

Cited by 173 publications

(88 citation statements)

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“…5). These findings may be due to the rigid body behavior of the vertebrae in the model which, according to Brinckmann et al [50] and Iatridis et al [51], is not realistic.…”

Section: Discussionmentioning

confidence: 98%

Osmoviscoelastic finite element model of the intervertebral disc

et al. 2006

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Intervertebral discs have a primarily mechanical role in transmitting loads through the spine. The disc is subjected to a combination of elastic, viscous and osmotic forces; previous 3D models of the disc have typically neglected osmotic forces. The fibrilreinforced poroviscoelastic swelling model, which our group has recently developed, is used to compute the interplay of osmotic, viscous and elastic forces in an intervertebral disc under axial compressive load. The unloaded 3D finite element mesh equilibrates in a physiological solution, and exhibits an intradiscal pressure of about 0.2 MPa. Before and after axial loading the numerically simulated hydrostatic pressure compares well with the experimental ranges measured. Loading the disc decreased the height of the disc and results in an outward bulging of the outer annulus. Fiber stresses were highest on the most outward bulging on the posterior-lateral side. The osmotic forces resulted in tensile hoop stresses, which were higher than typical values in a non-osmotic disc. The computed axial stress profiles reproduced the main features of the stress profiles, in particular the characteristic posterior and anterior stress which were observed experimentally.

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“…5). These findings may be due to the rigid body behavior of the vertebrae in the model which, according to Brinckmann et al [50] and Iatridis et al [51], is not realistic.…”

Section: Discussionmentioning

confidence: 98%

Osmoviscoelastic finite element model of the intervertebral disc

et al. 2006

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“…At small loads, the axial bulge of the endplate is small compared to the axial compression of the IV disc. However, at higher loads, the annulus fibers substantially stiffen the IV disc [9], and the contribution of the endplate bulge to the compliance of the IV joint becomes larger than the axial compression of the IV disc [7]. Without the endplate bulge, the radial bulge of the disc must increase considerably, which may damage the annulus fibers.…”

Section: Discussionmentioning

confidence: 99%

Load shift of the intervertebral disc after a vertebroplasty: a finite-element study

Baroud

Nemes

Heini

et al. 2003

European Spine Journal

278

218

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“…Second, vertebral bodies in older persons have high elastic deformability [13] due to the loss of bone mass, which allows increased buckling of the trabeculae and cortex [11]. This can explain the cupping deformation of the vertebral endplates in the spine of older persons [1,[13][14][15].…”

Section: Discussionmentioning

confidence: 99%

An increase in height of spinous process is associated with decreased heights of intervertebral disc and vertebral body in the degenerative process of lumbar spine

et al. 2013

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Purpose Currently degeneration of the intervertebral disc and joint in the degenerative process of the lumbar spine has mainly attracted the attention, however, there are very few literatures focusing on the height of the spinous process. Our objective was to examine in what generation the change in spinous process height occurs and how the change is involved in the degenerative process of the lumbar spine. Methods CT or CT myelography of 1,015 patients, 536 males and 579 females were measured in 6 items, including the heights of the L4 and L5 vertebral bodies, the L4 and L5 spinous processes, the L4/5 intervertebral disc, and the L5/S1 intervertebral disc. All data of the 6 items were analyzed and compared between gender in 5 age groups (40s, 50s, 60s, 70s and 80s). Results The results indicated a significant increase in the height of the L4 and L5 spinous process (P \ 0.01) in the 60-to 70-year-old group for both genders, and also showed that the L4 and L5 vertebral body height was significantly decreased in the 50-to 60-year-old group (P \ 0.01 in males, P \ 0.001 in females). Conclusions Changes in the spinous process morphology followed degenerative changes of the intervertebral disc and vertebral body in the degenerative process of the lumbar spine. This result may suggest that the morphological change of an increase in the height of the spinous process may be a kind of biological defense reaction to stabilize the intervertebral portion.

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Deformation of the Vertebral End-plate Under Axial Loading of the Spine

Cited by 173 publications

References 0 publications

Osmoviscoelastic finite element model of the intervertebral disc

Osmoviscoelastic finite element model of the intervertebral disc

Load shift of the intervertebral disc after a vertebroplasty: a finite-element study

An increase in height of spinous process is associated with decreased heights of intervertebral disc and vertebral body in the degenerative process of lumbar spine

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