The distribution of material properties in the equine third metacarpal bone serves to enhance sagittal bending

Les, C. M.; Stover, S. M.; Keyak, J. H.; Taylor, K. T.; Willits, N. H.

Affiliations

¹Veterinary Orthopedic Research Laboratory, Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616-8732, USA

²Rehabilitation Research and Development Service, Department of Veterans Affairs Medical Center, San Francisco, CA 94121. U.S.A.

³Division of Statistics, University of California, Davis, CA 95616, U.S.A.

Abstract and keywords

The distribution of material properties within the equine third metacarpal bone (MC3), and its possible effect on the mechanics of the structure, was quantitatively evaluated using single-load-to-failure compressive materials testing of specimens from ten horses. Bone samples from six regions within five proximodistal levels of MC3 were milled into right cylinders and compressed at a strain rate of 0.01 s⁻¹. Diaphyseal MC3 bone material was stiffer, stronger, deformed less to yield and failure, and absorbed more energy to yield, than metaphyseal cortical bone material. Lateral and medial MC3 cortical bone material was stiffer and deformed less to yield and failure, than dorsal and palmar material. This distribution of material properties appears to increase the structural compliance in the sagittal plane, and may serve to enhance the predictability of the strain distribution during normal locomotion, as is provided in other bones by a sagittal curvature.

Keywords: Equine; Metacarpus; Mechanical testing; Anatomic variation; Bone

Links

DOI: 10.1016/S0021-9290(96)00157-1

PubMed: 9075003

WoS: A1997WN13500006

History

Received: 1996-10-1

Revised: 1997-04-1

Online: 1998-01-5

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Cited By (12)

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2004	Yeni YN, Dong XN, Fyhrie DP, Les CM. The dependence between the strength and stiffness of cancellous and cortical bone tissue for tension and compression: extension of a unifying principle. Bio-med Mater Eng. 2004;14(3):303-310.
2011	Öhman C, Baleani M, Pani C, Taddei F, Alberghini M, Viceconti M, Manfrini M. Compressive behaviour of child and adult cortical bone. Bone. October 2011;49(4):769-776.
2003	Götzen N, Cross AR, Ifju PG, Rapoff AJ. Understanding stress concentration about a nutrient foramen. J Biomech. October 2003;36(10):1511-1521.
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2002	Les CM, Stover SM, Keyak JH, Taylor KT, Kaneps AJ. Stiff and strong compressive properties are associated with brittle post‐yield behavior in equine compact bone material. J Orthop Res. May 2002;20(2):607-614.
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