Hydration-induced nano- to micro-scale self-recovery of the tooth enamel of the giant panda

doi:10.1016/j.actbio.2018.09.053

CORC > 兰州理工大学 > 兰州理工大学

	Hydration-induced nano- to micro-scale self-recovery of the tooth enamel of the giant panda
	Liu, Zengqian 1,2; Weng, Zhaoyong 1; Zhai, Zhao-Feng 1; Huang, Nan 1; Zhang, Zhen-Jun 1; Tan, Jun 1; Jiang, Chuanbin 1; Jiao, Da 1; Tan, Guoqi 1,3; Zhang, Jian 1,4
刊名	ACTA BIOMATERIALIA
	2018-11
卷号	81 页码:267-277
关键词	Tooth enamel Self-recovery Durability Hydration Bioinspiration
ISSN号	1742-7061
DOI	10.1016/j.actbio.2018.09.053
英文摘要	The tooth enamel of vertebrates comprises a hyper-mineralized bioceramic, but is distinguished by an exceptional durability to resist impact and wear throughout the lifetime of organisms; however, enamels exhibit a low resistance to the initiation of large-scale cracks comparable to that of geological minerals based on fracture mechanics. Here we reveal that the tooth enamel, specifically from the giant panda, is capable of developing durability through counteracting the early stage of damage by partially recovering its innate geometry and structure at nano- to micro- length-scales autonomously. Such an attribute results essentially from the unique architecture of tooth enamel, specifically the vertical alignment of nano-scale mineral fibers and micro-scale prisms within a water-responsive organic-rich matrix, and can lead to a decrease in the dimension of indent damage in enamel introduced by indentation. Hydration plays an effective role in promoting the recovery process and improving the indentation fracture toughness of enamel (by similar to 73%), at a minor cost of micro-hardness (by similar to 5%), as compared to the dehydrated state. The nano-scale mechanisms that are responsible for the recovery deformation, specifically the reorientation and rearrangement of mineral fragments and the inter- and intra-prismatic sliding between constituents that are closely related to the viscoelasticity of organic matrix, are examined and analyzed with respect to the structure of tooth enamel. Our study sheds new light on the strategies underlying Nature's design of durable ceramics which could be translated into man-made systems in developing high-performance ceramic materials.
资助项目	Multi-University Research Initiative[AFOSR-FA9550-15-1-0009]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000451937500021
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32376]
专题	兰州理工大学材料科学与工程学院
通讯作者	Zhang, Zhefeng; Ritchie, Robert O.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 4.Lanzhou Univ Technol, State Key Lab Adv Nonferrous Mat, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zengqian,Weng, Zhaoyong,Zhai, Zhao-Feng,et al. Hydration-induced nano- to micro-scale self-recovery of the tooth enamel of the giant panda[J]. ACTA BIOMATERIALIA,2018,81:267-277.
APA	Liu, Zengqian.,Weng, Zhaoyong.,Zhai, Zhao-Feng.,Huang, Nan.,Zhang, Zhen-Jun.,...&Ritchie, Robert O..(2018).Hydration-induced nano- to micro-scale self-recovery of the tooth enamel of the giant panda.ACTA BIOMATERIALIA,81,267-277.
MLA	Liu, Zengqian,et al."Hydration-induced nano- to micro-scale self-recovery of the tooth enamel of the giant panda".ACTA BIOMATERIALIA 81(2018):267-277.