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甲晶体中化物吸收的分层分层,其年龄由原子探头断层扫描揭示出来

Jack R Grimm^1,2, Cameron Renteria^1,3, Semanti Mukhopadhyay²

¹Department of Materials Science and Engineering, University of Washington, Seattle, WA USA.

Communications materials

|December 23, 2024

概括

牙面膜的老化导致由于在氧酸盐纳米晶中的积而导致牙变脆. 这个由去矿和重矿化循环驱动的过程影响了质.

科学领域:

生物材料科学生物材料科学
纳米技术纳米技术
牙科研究牙科研究

背景情况:

牙面膜经历着持续的去矿和重矿化,导致与年龄相关的脆化.
对质老化机制的原子层次理解,特别是氧酸纳米晶体的组成变化,仍然有限.

研究的目的:

为了研究年轻人和老年人牙面膜之间的酸纳米晶体在原子尺度上的组成差异.
阐明牙面膜老化和脆化背后的机制.

主要方法:

利用原子探头断层扫描 (APT) 进行高分辨率的3D化学分析.
对比了来自年轻 (22岁) 和年长 (56岁) 的成年捐赠者的质样本.

主要成果:

与年轻面膜相比,在来自老面膜的纳米晶体外中观察到显著更高的含量.
在不同年龄组的纳米晶体的核心和晶体间相之间发现了最小的组成差异.
注入纳米晶体外被认为是乳液老化的关键因素.

结论:

牙面膜随着年龄的增长而变脆,部分原因是酸纳米晶体中的积累.
剥离和重矿化循环被认为是主要的机制,优先影响和重建纳米晶体外.

关键词:

生物矿物化生物矿物化图像技术的成像技术.

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