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European Spine Journal

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01-09-2012 | Original Article

Anular delamination strength of human lumbar intervertebral disc

Authors: Diane E. Gregory, Won C. Bae, Robert L. Sah, Koichi Masuda

Published in: European Spine Journal | Issue 9/2012

Abstract

Introduction

Progression of intervertebral disc (IVD) herniation does not occur exclusively in a linear manner through the anulus fibrosus (AF), but can migrate circumferentially due to localized AF delamination. Consequently, resistance to delamination is an important factor in determining risk of herniation progression. The inter-lamellar matrix located between the AF layers is responsible for resisting this delamination; however, its mechanical properties are largely unknown. This study aimed to determine the mechanical properties of the inter-lamellar matrix in human AF samples via a peel test.

Materials and methods

Seventeen human IVDs (degeneration grades of 2–3) were obtained from six lumbar spines. From these 17 discs, 53 tissue samples were obtained from the superficial and deep regions of the anterior and posterior AF. Samples were dissected into a ‘T’ configuration to facilitate a T-peel test (or 180-degree peel test) by initiating delamination between the two middle AF layers.

Results

Peel strength was found to be 33 % higher in tissues obtained from the superficial AF region as compared with the deep region (p = 0.047).

Conclusion

This finding may indicate a higher resistance to delamination in the superficial AF, and as a result, delamination and herniation progression may occur more readily in the deeper layers of the AF.

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Title: Anular delamination strength of human lumbar intervertebral disc
Authors: Diane E. Gregory
Won C. Bae
Robert L. Sah
Koichi Masuda
Publication date: 01-09-2012
Publisher: Springer-Verlag
Published in: European Spine Journal / Issue 9/2012
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-012-2308-x

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Anular delamination strength of human lumbar intervertebral disc

Abstract

Introduction

Materials and methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Materials and methods

Results

Conclusion

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