期刊
ACTA BIOMATERIALIA
卷 9, 期 5, 页码 6330-6337出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2012.12.029
关键词
Human enamel; Functionally graded material; Mechanical properties; Nanoindentation; Finite element analysis
资金
- Chinese National Science and Technology Support Program [2008BAG07B05-3]
- Fundamental Research Funds for the Central Universities [SWJTU 2011CXE]
- Key Laboratory of High-speed Railway Line Engineering Education Ministry
Human enamel has been found to be a coating with excellent mechanical performance, and has undergone extensive investigation and discussion. However, most of the reported studies consider the enamel as a homogeneous anisotropic biocomposite. The current study illustrated the graded properties of the biocomposite from its functional load-bearing direction. Within the thickness of the enamel, from the outer surface towards the enamel-dentin junction (EDJ), the elastic modulus (E(x)) and hardness (H(x)) of enamel exist in an exponential relationship with normalized thickness (x) as E(x) = 111.64x(0.18) (R-2 = 0.94) and H(x) = 4.41x(0.16) (R-2 = 0.87) GPa, respectively. Moreover, the creep ability of enamel increases towards the EDJ. The graded properties of the biocomposite can be explained by both microstructural and compositional changes along the thickness of the material towards the EDJ. Finite element analysis indicates that the graded properties of enamel have important roles in reducing the enameldentin interface stresses and maintaining the integrity of the multilayer tooth structure. The results provide a new angle to understand the excellent mechanical behaviour of the multilayer tooth structure and may inspire the development of new functionally graded materials and coating structures. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据