A micromechanics model of the elastic properties of human dentine
A micromechanics model of the elastic properties of human dentine
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DOI：
10.1016/s0003-9969(99)00080-1
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发表时间：
1999-10-01
影响因子：
3
通讯作者：
Marshall, SJ
中科院分区：
文献类型：
--
作者：
Kinney, JH;Balooch, M;Marshall, SJ
采用均匀各向同性基质相中柱状夹杂物的广义自洽模型，研究了牙本质小管取向对牙本质弹性性质的影响。给出了牙本质5个独立弹性常数与小管浓度、管周和管间的杨氏弹性系数和泊松比的闭合表达式。原子力显微镜压痕技术测定管周和管间牙本质的杨氏模数约为。GPA分别为30和15。在牙本质小管密度的自然变化中，轴向和横向剪切模数只随牙体位置的不同而略有变化，并且没有可测量到的小管方向的影响。结论：牙本质小管取向对牙本质弹性行为无明显影响，健康牙本质的弹性性质可用弹性模数约为各向同性的连续体来描述。16 Gpa，剪切模数6.2 Gpa。爱思唯尔科学有限公司出版。
A generalized, self-consistent model of cylindrical inclusions in a homogeneous and isotropic matrix phase was used to study the effects of tubule orientation on the elastic properties of dentine. Closed-form expressions for the five independent elastic constants of dentine were derived in terms of tubule concentration, and the Young's moduli and Poisson ratios of peri- and intertubular dentine. An atomic-force microscope indentation technique determined the Young's moduli of the peri- and intertubular dentine as approx. 30 and 15 GPa, respectively. Over the natural variation in tubule density found in dentine, there was only a slight variation in the axial and transverse shear moduli with position in the tooth, and there was no measurable effect of tubule orientation. It was concluded that tubule orientation has no appreciable effect on the elastic behaviour of normal dentine, and that the elastic properties of healthy dentine can be modelled as an isotropic continuum with a Young's modulus of approx. 16 GPa and a shear modulus of 6.2 GPa. Published by Elsevier Science Ltd.