NDLI: Dominant trabecular patterns of the calcaneus are aligned with the principal stress flow during standing

Content Provider	IEEE Xplore Digital Library
Author	Gefen, A. Seliktar, R.
Copyright Year	2002
Description	Author affiliation: Dept. of Biomed. Eng., Tel Aviv Univ., Israel (Gefen, A.)
Abstract	The calcaneus plays a critical role in bearing loads during body support or locomotion. In this study, the manifestation of Wolff's law of trabecular bone adaptation in the calcaneus has been analyzed. For this purpose, finite element (FE) analysis of the foot during standing was elaborated. Orientation of the principal stress flow through the calcaneus was compared with the trabecular alignment in cadaveric calcaneal specimens, by fitting second-order polynoms to real and FE-predicted trabecular paths and calculating their derivation around the calcaneal cortex. The dominant trabecular patterns observed in cadaveric sagittal specimens of the calcaneus could be classified into four groups; subsequent numerical simulations showed that the dorsal-plantar oriented and posterior oblique trabecular paths are aimed to support compressive stresses, while the antero-posteriorly directed and anterior oblique groups act to bear tension. Insertion angles of real trabecular paths into the calcaneal cortex did not differ significantly from simulations (maximal difference of 13 degrees). This suggests that the trabecular patterns of the calcaneus are mainly shaped by the isostatics (static principal stress flow) developing during the standing posture. The present modeling approach can be utilized to explore effects of abnormal alterations in the isostatic flow on the microarchitecture of the calcaneal trabeculae.
Starting Page	2579
Ending Page	2580
File Size	263290
Page Count	2
File Format	PDF
ISBN	0780376129
ISSN	1094687X
DOI	10.1109/IEMBS.2002.1053435
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Foot Cancellous bone Finite element methods Testing Compressive stress Brain modeling Solid modeling Magnetic resonance imaging Biological materials Tensile stress
Content Type	Text
Resource Type	Article

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