IMECH-IR  > 非线性力学国家重点实验室
Spatial distribution of the human enamel fracture toughness with aging
Zheng QH; Xu HP; Song F(宋凡); Zhang L; Zhou XD; Shao YF(邵颖峰); Huang DM; Shao, YF (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Peoples R China.
Source PublicationJOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
2013-10-01
Volume26Pages:148-154
ISSN1751-6161
AbstractA better understanding of the fracture toughness (KIC) of human enamel and the changes induced by aging is important for the clinical treatment of teeth cracks and fractures. We conducted microindentation tests and chemical content measurements on molar teeth from "young" (18 <= age <= 25) and "old" (55 <= age) patients. The KIC and the mineral contents (calcium and phosphorus) in the outer, the middle, and the inner enamel layers within the cuspal and the intercuspal regions of the crown were measured through the Vickers toughness test and Energy Dispersive X-Ray Spectroscopy (EDS), respectively. The elastic modulus used for the KIC calculation was measured through atomic force microscope (AFM)-based nanoindentation tests. In the outer enamel layer, two direction-specific values of the KIC were calculated separately (direction I, crack running parallel to the occlusal surface; direction II, perpendicular to direction I). The mean KIC of the outer enamel layer was lower than that of the internal layers (p<0.05). No other region-related differences in the mechanical properties were found in both groups. In the outer enamel layer, old enamel has a lower KIC, II and higher mineral contents than young enamel (p<0.05). The enamel surface becomes more prone to cracks with aging partly due to the reduction in the interprismatic organic matrix observed with the maturation of enamel.
KeywordFracture Toughness Mechanical Property Enamel Aging Mineral Content
Subject Area疲劳与断裂力学
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000322929900016
Funding OrganizationNational Natural Science Foundation of China [11272226, 11072252, 11023001]
DepartmentLNM生物材料微结构和力学性能
Classification一类
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47454
Collection非线性力学国家重点实验室
Corresponding AuthorShao, YF (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Zheng QH,Xu HP,Song F,et al. Spatial distribution of the human enamel fracture toughness with aging[J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,2013,26:148-154.
APA Zheng QH.,Xu HP.,宋凡.,Zhang L.,Zhou XD.,...&Shao, YF .(2013).Spatial distribution of the human enamel fracture toughness with aging.JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,26,148-154.
MLA Zheng QH,et al."Spatial distribution of the human enamel fracture toughness with aging".JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 26(2013):148-154.
Files in This Item: Download All
File Name/Size DocType Version Access License
IMCAS-J2013-233.pdf(1569KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zheng QH]'s Articles
[Xu HP]'s Articles
[宋凡]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zheng QH]'s Articles
[Xu HP]'s Articles
[宋凡]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zheng QH]'s Articles
[Xu HP]'s Articles
[宋凡]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: IMCAS-J2013-233.pdf
Format: Adobe PDF
This file does not support browsing at this time
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.