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TECHNICAL BRIEFS

Preparation of On-Axis Cylindrical Trabecular Bone Specimens Using Micro-CT Imaging

[+] Author and Article Information
Xiang Wang, Xiangyi Liu, Glen L. Niebur

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556

J Biomech Eng 126(1), 122-125 (Mar 09, 2004) (4 pages) doi:10.1115/1.1645866 History: Online March 09, 2004
Copyright © 2004 by ASME
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References

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Figures

Grahic Jump Location
The sample holder with a bone parallelepiped. The X and Y directions are aligned with the coordinate axes of the micro-CT scanner. The Z direction is the scanning direction.
Grahic Jump Location
The rotations of the specimen about the three Euler angles α, β and γ. (A) the original coordinate system; (B) the first rotation is about the z axis by angle α; (C) the second rotation is about the y axis by angle β; (D) the third rotation is about the z axis by angle γ, and (E) the resulting XYZ coordinate system after the three rotations, compared to the original one.
Grahic Jump Location
Custom vice for adjusting the principal orientation of the trabecular bone parallelepiped. The rotation direction follows the right hand rule. The coordinate systems here are the same as the coordinate systems indicated in Fig. 2. The final drilling direction is parallel with the z direction of the fixed coordinate system.
Grahic Jump Location
(A) The relationship of the principal fabric orientations (H123) and the material coordinates (XYZ) of the cylindrical trabecular bone specimens. (B) A 3-D image of the morphology of a trabecular bone specimen. In the original parallelepiped the deviation of the vertical axis from the fabric tensor was 11.0° (left). In the final specimen the deviation from the fabric tensor was 2.3° (right). The bone volume fracture was 0.3555.

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