Anatomic variation of depth-dependent mechanical properties in neonatal bovine articular cartilage
Articular cartilage has well known depth‐dependent structure and has recently been shown to have similarly non‐uniform depth‐dependent mechanical properties. Here, we study anatomic variation of the depth‐dependent shear modulus and energy dissipation rate in neonatal bovine knees. The regions we sp...
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Published in | Journal of orthopaedic research Vol. 31; no. 5; pp. 686 - 691 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.05.2013
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Subjects | |
Online Access | Get full text |
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Summary: | Articular cartilage has well known depth‐dependent structure and has recently been shown to have similarly non‐uniform depth‐dependent mechanical properties. Here, we study anatomic variation of the depth‐dependent shear modulus and energy dissipation rate in neonatal bovine knees. The regions we specifically focus on are the patellofemoral groove, trochlea, femoral condyle, and tibial plateau. In every sample, we find a highly compliant region within the first 500 µm of tissue measured from the articular surface, where the local shear modulus is reduced by up to two orders of magnitude. Comparing measurements taken from different anatomic sites, we find statistically significant differences localized within the first 50 µm. Histological images reveal these anatomic variations are associated with differences in collagen density and fiber organization. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 31: 686–691, 2013 |
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Bibliography: | ArticleID:JOR22303 ark:/67375/WNG-25TBSZH0-D National Institutes of Health - No. R21 AR054867 NSF - No. DMR-1056662 istex:6929D33A0FC34E352139A1C9D6D7900BA9D29DB2 National Science Foundation Graduate Research Fellowship ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0736-0266 1554-527X |
DOI: | 10.1002/jor.22303 |