The enamel softening and loss during early erosion studied by AFM, SEM and nanoindentation
The enamel softening and loss during early erosion studied by AFM, SEM and nanoindentation
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DOI：
10.1088/1748-6041/4/1/015020
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发表时间：
2009-02-01
影响因子：
4
通讯作者：
Yan, Jian-Xin
中科院分区：
文献类型：
--
作者：
Cheng, Zhen-Jiang;Wang, Xiu-Mei;Yan, Jian-Xin
牙釉质溶解发生在它与牙菌斑细菌、食物或饮料产生的酸接触时。已经有许多不同的研究量化和表征釉质侵蚀的速率，程度和化学方面;然而，关于釉质软化和损失的数量仍然存在激烈的争论。本研究的目的是以高精度测量釉质侵蚀过程。原生第三磨牙在柠檬酸（pH = 3.8）中部分侵蚀，其中一些域由Ti涂层保护。利用原子力显微镜、扫描电镜和纳米压痕仪分别研究了柠檬酸作用前后的表面形貌和结构。在此基础上，首次建立了釉质软化量、流失量与侵蚀时间之间的函数关系。结果表明，AFM、SEM和纳米压痕法均适用于早期釉质脱矿的定性和定量测量。
Enamel dissolution occurs when it contacts with acids produced by plaque bacteria, foods or drinks. There have been numerous and varied studies quantifying and characterizing the rate, extent and chemical aspects of enamel erosion; however, there is still hot debate about the amounts of enamel softening and loss. The objective of this study was to measure the enamel erosion process with high accuracy. Native third molars were partly eroded in citric acid ( pH = 3.8) with some domains protected by a Ti coating layer. The surface morphology and structures before and after exposure to citric acid for different time periods were studied by AFM, SEM and nanoindentation, respectively. Based on this, the functions between the amounts of enamel softening, loss and erosion time were established for the first time. It was demonstrated that AFM, SEM and nanoindentation were suitable for measuring the early stages of enamel demineralization qualitatively and quantitatively.