根据L'Eclairage委员会,在三种类型的对齐器中经历了色度变化
Teresa Domingo-Jiménez1, María José González-Olmo1, Carolina Nieto-Moraleda1
1Department of Orthodontics, University Rey Juan Carlos, Alcorcón, CP 28922, Madrid, Spain.
European journal of orthodontics
|September 30, 2024
概括
在Invisalign®调整器显示咖啡显著的颜色变化,变得更深,更红,和更多的黄色. 在七天的时间里,Spark®调整器还在水和咖啡中改变了颜色.
科学领域:
- 牙科材料科学 牙科材料科学
- 矯正牙科 矯正牙科是一種矯正牙科.
- 测色仪的颜色测量方法
背景情况:
- 清晰的对齐器被广泛用于正统牙科治疗.
- 了解材料的稳定性和颜色变化对于患者的满意度至关重要.
- 不同的对齐器品牌可能对着色剂有不同的反应.
研究的目的:
- 为了比较三个对齐器品牌 (Invisalign®,Spark®,QuickSmile®) 在接触咖啡和蒸水时的色度变化 (L*,a*,b*).
- 为了评估这些对齐器类型的初始色度特征.
主要方法:
- 测试了120个对齐器 (包括Invisalign®,Spark®,QuickSmile®的40个).
- 调整器被浸泡在蒸水或咖啡中.
- 用光谱光度测量在基线,12小时和7天测量颜色.
- 计算和统计分析了颜色变化 (ΔE*).
主要成果:
- 最初,Invisalign®和Spark®的颜色更红,QuickSmile®的颜色更绿;所有这些都倾向于黄色,而Invisalign®的颜色最少.
- 在水中,Spark®在7天后显示出明显的变化;Invisalign®和QuickSmile®显示出轻微的变化.
- 在咖啡中,Invisalign®在12小时和7天内表现出显著的颜色变化 (更深,更红,更黄色);Spark®在7天后表现出明显的变化.
结论:
- 在Invisalign®对齐器最初具有更红,更少的黄色色调.
- 在7天的时间里,Spark®调整器在水中显示出明显的颜色变化.
- 咖啡显著影响Invisalign®颜色,导致变黑,并转变为红色和黄色色调,突出显示患者意识的必要性.
相关概念视频
Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Color Vision
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.


