Spatial distribution of the human enamel fracture toughness with aging
文献类型：期刊论文
| 作者 | Zheng QH; Xu HP; Song F(宋凡) ; Zhang L; Zhou XD; Shao YF(邵颖峰); Huang DM
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| 刊名 | JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
 |
| 出版日期 | 2013-10-01 |
| 卷号 | 26页码:148-154 |
| 通讯作者邮箱 | shaoyf@lnm.imech.ac.cn |
| 关键词 | Fracture toughness Mechanical property Enamel Aging Mineral content |
| ISSN号 | 1751-6161 |
| 产权排序 | [Zheng, Qinghua; Xu, Haiping; Zhang, Lan; Zhou, Xuedong; Huang, Dingming] Sichuan Univ, West China Hosp Stomatol, State Key Lab Oral Dis, Chengdu 610064, Peoples R China; [Song, Fan; Shao, Yingfeng] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Peoples R China; [Zhou, Xuedong; Huang, Dingming] Sichuan Univ, West China Coll Stomatol, Dept Conservat Dent & Endodont, Chengdu 610041, Peoples R China |
| 通讯作者 | Shao, YF (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Peoples R China. |
| 合作状况 | 国内 |
| 中文摘要 | A 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. |
| 学科主题 | 疲劳与断裂力学 |
| 分类号 | 一类 |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [11272226, 11072252, 11023001] |
| 原文出处 | http://dx.doi.org/10.1016/j.jmbbm.2013.04.025 |
| 语种 | 英语 |
| WOS记录号 | WOS:000322929900016 |
| 公开日期 | 2013-09-27 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/47454]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 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.,...&Huang DM.(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. |
入库方式： OAI收割
来源：力学研究所
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