Micromechanical characterization of prismless enamel in the tuatara, Sphenodon punctatus.

Micromechanical characterization of prismless enamel in the tuatara, Sphenodon punctatus.
复制标题

斑蜥无棱牙釉质的微机械特征

DOI:
10.1016/j.jmbbm.2014.07.024
复制
发表时间:
2014
影响因子:
3.9
通讯作者:
Schneider GA
Schneider GA
中科院分区:
工程技术2区
文献类型:
--
作者:
Yilmaz ED;Bechtle S;Ozcoban H;Kieser JA;Swain MV;Schneider GA

文献摘要

参考文献

被引文献

相似文献

牙釉质是一种天然存在的矿物质和蛋白质的生物复合材料,经过数百万年的进化,从简单的无棱柱状结构进化到先进的棱柱状结构。探索具有不同特征的结构特征的力学功能对于进化发育研究以及材料科学家寻求生物材料力学性能模型具有重要意义。本研究对无棱柱状斑蝶牙釉质的力学性能进行了表征。微悬臂弯曲试样的断裂强度和弹性模量在平行晶长轴方向上分别为640±87 MPa和42±6 GPa,在正交方向上减小。兔牙釉质的固有断裂韧性为0.21 MPa m1/2 ~ 0.32 MPa m1/2。这些值对应于柱状牙釉质在等级1中观察到的值范围的下限。
Dental enamel – a naturally occurring biocomposite of mineral and protein – has evolved from a simple prismless to an advanced prismatic structure over millions of years. Exploring the mechanical function of its structural features with differing characteristics is of great importance for evolutionary developmental studies as well as for material scientists seeking to model the mechanical performance of biological materials. In this study, mechanical properties of prismless tuataraSphenodon punctatusenamel were characterized. Using micro-cantilever bending samples the fracture strength and elastic modulus were found to be 640±87 MPa and 42±6 GPa, respectively in the orientation parallel to the crystallite long axis, which decreased in the orthogonal direction. The intrinsic fracture toughness of tuatara enamel ranged from 0.21 MPa m1/2and 0.32 MPa m1/2. These values correspond to the lower limit of the range of values observed in prismatic enamel at the hierarchical level 1.
牙齿的发育、功能和进化:哺乳动物牙釉质功能分化的途径
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
J. Rensberger
通讯作者: J. Rensberger
牙齿的发育、功能和进化:牙釉质分化的两种不同策略:有袋动物与真兽动物
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
W. Koenigswald
通讯作者: W. Koenigswald
DOI: 10.1016/j.jsb.2013.09.018
发表时间: 2013-11-01
影响因子: 3
作者:
Enax, Joachim;Fabritius, Helge-Otto;Epple, Matthias
通讯作者: Epple, Matthias
DOI: 10.1098/rsif.2011.0498
发表时间: 2012-06-07
影响因子: 3.9
作者:
Bechtle, Sabine;Oezcoban, Hueseyin;Schneider, Gerold A.
通讯作者: Schneider, Gerold A.
DOI: 10.1016/j.biomaterials.2009.09.050
发表时间: 2010-01-01
期刊: BIOMATERIALS
影响因子: 14
作者:
Bechtle, Sabine;Habelitz, Stefan;Schneider, Gerold A.
通讯作者: Schneider, Gerold A.