Abstract
In osteoporotic patients, the sites most prone to fracture are characterized by a predominance of cancellous bone. It has been shown that trabecular architecture plays a crucial role in the mechanical performance of this type of bone. It therefore appears necessary to be able to describe this architecture within an elementary volume. This requires a quantification of the anisotropy of the bone, i.e. a description of the preferred orientations of its architectural elements. Classical techniques are based on the use of a symmetrical second-order tensor, implying orthotropic symmetry within the bone, which is not always the case. In order to properly characterize the architectural anisotropy of cancellous bone samples, this paper presents a new approach for computing the preferred orientations of CT-scanned samples. This method is based on the skeletonization of surfaces reconstructed from binarized CT images, on the use of a projector on the directing vectors of the skeletal rods and finally on the 3D surface analysis of the distribution of the orientations and lengths of the rods. The method introduced has made it possible to obtain the preferred directions of 52 samples of bovine cancellous bone and to show that, in general, these directions are not orthogonal, refuting the oversimplification of orthotropic models.
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Rogalski, N., Cluzel, C., Laporte, S. (2020). A Method for the Quantification of Architectural Anisotropy in Cancellous Bone Samples Using CT Images. In: Abali, B., Giorgio, I. (eds) Developments and Novel Approaches in Biomechanics and Metamaterials. Advanced Structured Materials, vol 132. Springer, Cham. https://doi.org/10.1007/978-3-030-50464-9_10
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DOI: https://doi.org/10.1007/978-3-030-50464-9_10
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