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首页> 外文期刊>Acta biomaterialia >Comparison of the structure and mechanical properties of bovine femur bone and antler of the North American elk (Cervus elaphus canadensis).
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Comparison of the structure and mechanical properties of bovine femur bone and antler of the North American elk (Cervus elaphus canadensis).

机译：北美麋鹿（Cervus elaphus canadensis）的牛股骨和鹿角的结构和力学性能的比较。

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摘要

Antler and limb bone have a similar microstructure and chemical composition. Both are primarily composed of type I collagen and a mineral phase (carbonated apatite), arranged in osteons in compact (cortical bone) sections and a lamellar structure in the cancellous (spongy or trabecular bone) sections. The mineral content is lower in antler bone and it has a core of cancellous bone surrounded by compact bone running through the main beam and tines. The mineral content is higher in the compact compared with the cancellous bone, although there is no difference in ratios of the mineral elements with calcium. Mechanical tests (bend and compression) on longitudinal and transverse orientations of dry and rehydrated compact bone of North American elk (Cervus elaphus canadensis) antlers are compared with known data on other antlers as well as bovine femora. Both dry and rehydrated bones are highly anisotropic, with the bending and compressive strength and elastic modulus higher in the longitudinal than in the transverse direction. There is no significant difference between the bend strength and elastic modulus between dry and rehydrated samples tested in the transverse direction. The elastic modulus measured from the bending tests is compared with composite models. The elastic modulus and bend strengths are lower in the rehydrated condition, but the strain to failure and fracture toughness is much higher compared with dry samples. All antler bone mechanical properties are lower than that of bovine femora. The antler has a much higher fracture toughness compared with bovine femora, which correlates with their main function in intraspecific combat as a high impact resistant, energy absorbent material. A model of compression deformation is proposed, which is based on osteon sliding during shear.
机译：鹿角和四肢骨骼具有相似的微观结构和化学成分。两者都主要由I型胶原蛋白和矿物质相（碳酸磷灰石）组成，它们排列在紧致（皮质骨）部分的骨质中，并排列在松质（海绵状或小梁骨）部分的层状结构。鹿角骨中的矿物质含量较低，它的核心是松质骨，周围是贯穿主梁和尖齿的致密骨。与钙质松质骨相比，压块中的矿物质含量更高，尽管矿物质元素与钙的比例没有差异。将北美麋鹿（Cervus elaphus canadensis）鹿角干燥和再水化的致密骨的纵向和横向取向的机械测试（弯曲和压缩）与其他鹿角以及牛股骨的已知数据进行了比较。干燥和再水化的骨头都是高度各向异性的，其纵向的弯曲和压缩强度以及弹性模量比横向的要高。在横向上测试的干燥和再水化样品之间的弯曲强度和弹性模量之间没有显着差异。将弯曲测试中测得的弹性模量与复合模型进行比较。在再水合条件下，弹性模量和弯曲强度较低，但与干燥样品相比，断裂应变和断裂韧性要高得多。所有鹿角骨的机械性能均低于牛股骨。与牛股骨相比，鹿角的断裂韧性要高得多，这与它们在种内战斗中的主要功能有关，即高抗冲，能量吸收材料。提出了基于剪切过程中骨质滑动的压缩变形模型。

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