牙科锡尔科尼亚的光学特性的厚度和组成驱动的变化
Shoko Miura1, Masanori Fujisawa2, Pekka Vallittu3
1Associate Professor, Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Sakado, Saitama, Japan.
The Journal of prosthetic dentistry
|January 28, 2026
概括
牙氧化的厚度显著影响光学性能,厚度增加超过了色彩稳定性值,并降低了半透明度. 材料的选择需要考虑 yttria 含量,厚度,美学和光透度,以实现适当的聚合.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 光学物理学 光学物理学
背景情况:
- 牙科用的光学特性,包括色彩稳定性,半透明度,光谱反射率和辐射透射率,尚未完全了解关于ytria含量和材料厚度.
- 增加的伊特里亚含量增加了透光度,但视觉外观和实际光透率之间的差异使牙科修复材料的选择变得复杂.
- 不同类型的石缺乏标准化的比较数据,可能导致恢复性牙科的临床结果不足.
研究的目的:
- 为了研究不同伊特里亚含量和样品厚度对牙的光学性能的影响.
- 量化颜色差异 (ΔE00),半透明度参数 (TP00),光谱反射率和光辐射传导率的变化.
主要方法:
- 准备了五种类型的 zirconia标本 (一个单层HT,四个多层HM,UM,SM,YM) 具有不同的 yttria 含量和厚度.
- 使用光谱仪测量L*a*b*值;根据厚度变化计算 ΔE00和 TP00.
- 评估光谱反射率 (400-700 nm) 和在LED光线下 (1200 mW/cm2) 的辐射透射率,以确定聚合的相关性.
主要成果:
- 增加样品厚度显著提高色差 (ΔE00) 超出临床可接受性 (>1.8) 在所有石类型.
- 半透明度参数 (TP00) 和辐射透射率在所有测试的石材料中随着厚度的增加而下降.
- 单层HT石在所有厚度上都表现出最高的辐射,而多层石则表现出复杂的,波长依赖的光谱反射率.
结论:
- 伊特里亚的含量和厚度都显著影响牙科的光学特性,厚度增加超过了可接受的色差值.
- 透光性随着厚度的增加而减小,只有单层HT,在厚度≤1.5mm时,始终达到关键辐射传导值 (400mW/cm2).
- 临床医生必须考虑美学,光强度,含量和厚度在选择时,以确保充足的聚合与光固化剂.
相关概念视频
02:24Properties of Enantiomers and Optical Activity
21.7K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
21.7K
01:14What is Variation?
18.4K
Apart from the measures of central tendency, distribution, outliers, and the changing characteristics of data with time, an important characteristic of any data set is its variation or spread. In some data sets, the data values are concentrated closely near the mean; in others, the data values are more widely spread out from the mean.
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
18.4K
02:57Physical and Chemical Properties of Matter
166.2K
The characteristics that enable us to distinguish one substance from another are called properties.
166.2K
02:32Variation: Normal Distribution, Range, and Standard Deviation
27.6K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
27.6K
01:19Variation
8.0K
An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
8.0K
03:35Classifying Matter by Composition
90.3K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
90.3K