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Intrinsic mechanical properties of trabecular calcaneus determined by finite-element models using 3D synchrotron microtomography by H. Follet; F. Peyrin; E. Vidal-Salle; A. Bonnassie; C. Rumelhart; P.J. Meunier is a Medicine article available to read on EtoBox.

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To determine intrinsic mechanical properties (elastic and failure) of trabecular calcaneus bone, chosen as a good predictor of hip fracture, we looked for the influence of image's size on a numerical simulation. One cubic sample of cancellous bone (9 Â 9 Â 9 mm 3 ) was removed from the body of the calcaneus (6 females, 6 males, 7979 yr). These samples were tested under compressive loading. Before compressive testing, these samples were imaged at 10.13 mm resolution using a 3D microcomputed tomography (mCT) (ESRF, France). The mCT images were converted to finite-element models. Depending on the bone density values (BV/TV), we compared two different finite element models: a linear hexahedral and a linear beam finite element models. Apparent experimental Young's modulus ðE exp app Þ and maximum apparent experimental compressive stress ðs exp max Þ were significantly correlated with bone density obtained by Archimedes's test (E exp app 1⁄4 2367231 MPa [19-742 MPa], s exp max 1⁄4 2.6171.97 MPa [0.28-5.81 MPa], r40.80, po0.001) . Under threshold at 40 mm, the size of the numerical samples (5.18 3 and 6.68 3 mm 3 ) seems to be an important parameter on the accuracy of the results. The num

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Author

H. Follet; F. Peyrin; E. Vidal-Salle; A. Bonnassie; C. Rumelhart; P.J. Meunier

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0021-9290)

Published

2007

Language

EN

Field

Medicine (Health Sciences)