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Comparison of trabecular bone anisotropies based on fractal dimensions and mean intercept length determined by principal axes of inertia

Cited 13 time in Web of Science Cited 15 time in Scopus
Authors
Yi, Won-Jin; Heo, Min-Suk; Lee, Sam-Sun; Choi, Soon-Chul; Huh, Kyung-Hoe
Issue Date
2007-04
Publisher
SPRINGER HEIDELBERG
Citation
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, Vol.45, No.4, pp.357-364
Keywords
mechanical quality of trabecular boneprincipal axes of inertiamean intercept lengthdirectional anisotropy of the trabecular bonedirectional fractal dimensions
Abstract
The mechanical quality of trabecular bone depends on both its stiffness and its strength characteristics, which can be predicted indirectly by the combination of bone volume fraction and architectural anisotropy. To analyze the directional anisotropy of the trabecular bone, we applied the fractal geometry technique to plain radiographs. The anisotropy of the bone was quantified from an ellipse, based on the directional fractal dimensions (FD), by the principal axes of inertia. The anisotropies based on the FD were compared with those determined using the common method of mean intercept length (MIL). The directional FD gave the fractal information obtained from a projection along the MIL orientation. For this reason, the spatial variations associated with the bone length in any direction were manifested in a related frequency band of the power spectrum determined along the direction. The directional FD and MIL plots were highly correlated, although they originated from quite different geometries. Of the angle, premolar, and incisor regions of the human mandible, the anisotropies calculated using both FD and MIL showed the highest correlation in the trabecular bone of the angle region. The method using directional FDs as determined by the principal axis of inertia measures the anisotropy directly, using two-dimensional plain radiographs. This kind of method will be a useful to provide better estimates of bone quality in vivo compared with the density measurements alone, especially for the indirect diagnosis of jawbone quality in dental clinics.
ISSN
0140-0118
Language
English
URI
https://hdl.handle.net/10371/80366
DOI
https://doi.org/10.1007/s11517-006-0152-z
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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