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	Quantitatively studying nano-mechanical properties within the prism and organic sheath of enamel
	Cui, FZ ; Ge, J ; Wang, XM
	2010-05-10 ; 2010-05-10
会议名称	Structure and Mechanical Behavior of Biological Materials ; Symposium on Structure and Mechanical Behavior of Biological Materials held at the 2005 MRS Spring Meeting ; San Francisco, CA ; Web of Science ; INSPEC
关键词	DENTAL ENAMEL MICROSTRUCTURE BONE Engineering, Biomedical Materials Science, Biomaterials Materials Science, Characterization & Testing
中文摘要	Enamel is made up of enamel prisms separated by thin layer of organic sheaths. The mechanical properties of the prisms and the organic sheaths are obviously different from each other due to different compositions and microstructures. However, quantitative measurements of such differences have been a challenge in the past. The objective of this study is to accurately study the mechanical properties in the isolated domains within single enamel prism. The technique of nanoindentation combined with Atomic Force Microscopy (AFM) was employed to test the enamel specimens from mature human maxillary third molar. It was revealed that the nanohardness and elastic modulus of the sheaths were about 73.6% and 52.7% lower than those of the prisms. AFM topographies of the residual indent impressions also visually confirmed the differences. In addition to nanoindentation tests, the microstructures of enamel were carefully investigated in terms of hierarchical levels of organization to understand the structural reasons of the mechanical differences. We found a close relation between the variations of mechanical properties of enamel and its hierarchical structure. The analysis of the mechanical properties within enamel upon hierarchy is not only helpful to understand its unique property, but may also inspire ideas for the design of novel synthetic materials.
会议录出版者	MATERIALS RESEARCH SOCIETY ; WARRENDALE ; 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18265]
专题	清华大学
推荐引用方式 GB/T 7714	Cui, FZ,Ge, J,Wang, XM. Quantitatively studying nano-mechanical properties within the prism and organic sheath of enamel[C]. 见:Structure and Mechanical Behavior of Biological Materials, Symposium on Structure and Mechanical Behavior of Biological Materials held at the 2005 MRS Spring Meeting, San Francisco, CA, Web of Science, INSPEC.

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