Trabecular bone scales allometrically in mammals and birds.
Trabecular bone scales allometrically in mammals and birds.
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DOI:
10.1098/rspb.2011.0069
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发表时间:
2011-10-22
期刊:
影响因子:
--
通讯作者:
Shefelbine SJ
中科院分区:
文献类型:
--
作者:
Doube M;Klosowski MM;Wiktorowicz-Conroy AM;Hutchinson JR;Shefelbine SJ
Many bones are supported internally by a latticework of trabeculae. Scaling of whole bone length and diameter has been extensively investigated, but scaling of the trabecular network is not well characterised. We analysed trabecular geometry in the femora of 90 terrestrial mammalian and avian species with body masses ranging from 3 g to 3400 kg. We found that bone volume fraction does not scale substantially with animal size, while trabeculae in larger animals’ femora are thicker, further apart and fewer per unit volume than in smaller animals. Finite element modelling indicates that trabecular scaling does not alter the bulk stiffness of trabecular bone, but does alter strain within trabeculae under equal applied loads. Allometry of bone’s trabecular tissue may contribute to the skeleton’s ability to withstand load, without incurring the physiologic or mechanical costs of increasing bone mass.
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影响因子:
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作者:
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通讯作者:
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