An inhomogeneous and anisotropic constitutive model of human dentin

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	An inhomogeneous and anisotropic constitutive model of human dentin
	Huo B(霍波)
刊名	Journal of Biomechanics
	2005
通讯作者邮箱	huobo@imech.ac.cn
卷号	38 期号:3 页码:587-594
ISSN号	0021-9290
通讯作者	Huo, B (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
中文摘要	Dentin constitutes the major part of human tooth. It is composed of a large number of tubules with both variational radii and radially parallel pattern. In addition, peritubular dentin surrounds each tubule lumen and has a higher elastic modulus than the matrix of dentin, i.e. intertubular dentin. Considering the above microstructural characteristics, a micromechanics model is used in this paper to evaluate the overall elastic properties of dentin. Five independent effective elastic parameters in transverse isotropic elasticity matrix can be expressed analytically by the material parameters of peri- and intertubular dentin and the volume fraction of tubules. To determine the effectivity of this theoretical model, a finite element (FE) model simulating a longitudinal tooth slice in moir!e fringe testing of Wang and Weiner (J. Biomech. 31 (1998) 135) was performed. Furthermore, the FE model was developed incorporate modeling of variation of tubule’s diameter and softer characteristic of intertubular dentin near the dentin–enamel junction and around the pulp chamber. It turned out that the isoline figure of longitudinal displacement by FE calculation has very similar patterns to the moir!e fringe results. However, the FE results of displacement by traditional stress–strain models which regard dentin as a homogeneous and isotropic material show an obviously different strain distributions as compared to published moir!e fringes results. Thus the inhomogeneous and anisotropic model developed in this paper more accurately reflects the true physical nature of human dentin.
学科主题	生物力学
类目[WOS]	Biophysics ; Engineering, Biomedical
研究领域[WOS]	Biophysics ; Engineering
关键词[WOS]	MECHANICAL-PROPERTIES ; TUBULE ORIENTATION ; SHEAR-STRENGTH ; YOUNGS MODULUS ; LOCATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000226884200023
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/15543]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Huo B. An inhomogeneous and anisotropic constitutive model of human dentin[J]. Journal of Biomechanics,2005,38(3):587-594.
APA	霍波.(2005).An inhomogeneous and anisotropic constitutive model of human dentin.Journal of Biomechanics,38(3),587-594.
MLA	霍波."An inhomogeneous and anisotropic constitutive model of human dentin".Journal of Biomechanics 38.3(2005):587-594.