牙,牙 enamel 和它们的结合的特性,用Brillouin散射研究并与拉曼显微镜相比较
Alban Desoutter1, Didier Felbacq2, Csilla Gergely2
1LBN, Univ. Montpellier, 545 avenue Professeur Jean-Louis Viala, 34193 Montpellier Cedex 5, France.
Archives of oral biology
|May 29, 2023
概括
布里卢恩显微镜揭示了牙-乳结 (DEJ) 中化学组成和机械特性之间的相关性. 这种技术可视化了二次结构,有助于理解牙组织组织学.
科学领域:
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
- 牙科研究 牙科研究
背景情况:
- 牙 - 乳结 (DEJ) 对于牙的弹性和裂传播阻力至关重要.
- 了解DEJ的化学和微生物力学特性对于牙健康至关重要.
- 目前对DEJ复杂结构和属性的理解需要先进的成像技术.
研究的目的:
- 将Brillouin显微镜应用于DEJ复杂的生物结构.
- 为了比较Brillouin显微镜的结果与使用拉曼显微镜获得的结果.
- 在DEJ研究机械和化学性能之间的相关性.
主要方法:
- 利用Brillouin显微镜进行基于声波声-激光光子相互作用的非接触式微观尺度测量.
- 使用拉曼显微镜获得与特定化学键相关的光谱.
- 来自布里卢恩显微镜的机械性质 (刚度) 与来自拉曼显微镜的化学性质 (酸盐含量) 相关联.
主要成果:
- 在DEJ的机械性能 (刚性) 和化学成分 (酸盐含量) 之间建立了相关性.
- 使用这两种技术,获得了管道之间的平均距离 (4-6μm) 的兼容测量结果.
- 首次可视化了面膜的每日交叉条纹,将酸盐度变化与面膜镜内的刚性变化联系起来.
结论:
- 证明了布里卢恩散射显微镜在研究像DEJ这样的复杂生物材料方面的实用性.
- 展示了Brillouin显微镜可视化牙组织中的二次结构的能力.
- 突出了化学组成和机械特性之间的相关性如何增强对组织组织学和牙生物力学的理解.
相关概念视频
Raman Spectroscopy: Overview
480
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
480
Raman Spectroscopy Instrumentation: Overview
470
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
470
Scanning Electron Microscopy
4.3K
A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Fundamental Principles
Accelerated...
4.3K
X-ray Crystallography
24.0K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
24.0K
X-ray Diffraction of Biological Samples
3.9K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
3.9K


