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A mechanical model for the human intervertebral disc.

Abstract：

:Stress relaxation experiments were performed on specimens from a human intervertebral disc. Specimens were made from the nucleus pulposus and from the external lamellae of the anulus fibrosus in two different orientations. Tests were run with varying moisture content so as to develop a relaxation master curve. A model was developed based on the experimental data. It was found that the short term master curve for the lamellae of the anulus and nucleus are similar, whereas the long term rubbery plateau is different between the lamellae and the nucleus. It was also established that the master curves for different lamellae and the nucleus were shifted relative to each other in the time domain due to changes in water content. The average relaxation modulus of the whole disc was obtained by averaging the properties between the anulus and nucleus. This model was then used for studies of Schmorl's nodes, of degenerated discs and for circumstances in which hydration is considered to be important.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Panagiotacopulos ND,Pope MH,Krag MH,Bloch R

doi

10.1016/0021-9290(87)90144-8

subject

Has Abstract

pub_date

1987-01-01 00:00:00

pages

839-50

issue

9

eissn

0021-9290

issn

1873-2380

pii

0021-9290(87)90144-8

journal_volume

20

pub_type

杂志文章

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