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. 2017 Jun 28;36(1):192–201. doi: 10.1002/jor.23627

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© 2017 The Authors. Journal of Orthopaedic Research® Published by Wiley Periodicals, Inc. on behalf of Orthopaedic Research Society

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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(A) Distribution of failure locations at inner annulus fibrosus (AF) and outer AF regions, with red arrow showing typical direction of failure progression from inner to outer AF. CEP, cartilage endplate; (B) Stress‐strain curves for representative posterior annulus and anterior annulus specimens. Posterior specimens had a shorter toe region and lower failure strain (denoted by black arrows) than anterior specimens, as well as a higher modulus than anterior specimens (p < 0.01). Strains on x‐axis are grip‐to‐grip strains along the loading axis.