PDF(Pubmed)
Abstract：
BACKGROUND: Fluorescence-aided identification technique (FIT) studies for orthodontic resins are relatively new, using an arbitrary selection of resins, lights, and work parameters. In order to provide FIT guidelines for optimal visualization, the objectives of this study were to describe the electromagnetic characteristics of fluorescent orthodontic resins, determine appropriate light specification, and describe light and work parameter effects on resin fluorescence.
METHODS: This in vitro study assessed five fluorescent orthodontic resins and a non-fluorescent control resin using spectrophotometry, a scaled image analysis of 25 μm thick resins to compare intensities, and a visual assessment. Light sources varied by flashlight lens (narrow [N], average [X], and magnified [Z]) and UV intensity (X and X High). Work parameters included distance (20-300 mm) and angulation (15-70°). Visual scores were assigned to determine discernibility.
RESULTS: The average excitation maxima was 384 nm. Fluorescence increased with more direct UV light exposure. The highest intensity was recorded with Light X High at 50 mm and 70°. Visual assessment followed image analysis trends, and fluorescence was clinically discernable for all 25 μm thick samples.
CONCLUSIONS: Excitation wavelength range of 395-405 nm is appropriate for FIT illumination. All resins were anisotropic and showed greater fluorescence with greater angle, higher UV intensity, and closer proximity.
METHODS: This in vitro study assessed five fluorescent orthodontic resins and a non-fluorescent control resin using spectrophotometry, a scaled image analysis of 25 μm thick resins to compare intensities, and a visual assessment. Light sources varied by flashlight lens (narrow [N], average [X], and magnified [Z]) and UV intensity (X and X High). Work parameters included distance (20-300 mm) and angulation (15-70°). Visual scores were assigned to determine discernibility.
RESULTS: The average excitation maxima was 384 nm. Fluorescence increased with more direct UV light exposure. The highest intensity was recorded with Light X High at 50 mm and 70°. Visual assessment followed image analysis trends, and fluorescence was clinically discernable for all 25 μm thick samples.
CONCLUSIONS: Excitation wavelength range of 395-405 nm is appropriate for FIT illumination. All resins were anisotropic and showed greater fluorescence with greater angle, higher UV intensity, and closer proximity.
摘要：
背景：正畸树脂的荧光辅助识别技术（FIT）研究相对较新，使用任意选择的树脂，灯光,和工作参数。为了提供最佳可视化的FIT指南，本研究的目的是描述荧光正畸树脂的电磁特性，确定适当的灯光规格，并描述了光和工作参数对树脂荧光的影响。
方法：这项体外研究使用分光光度法评估了五种荧光正畸树脂和一种非荧光对照树脂，对25μm厚的树脂进行缩放图像分析，以比较强度，和视觉评估。光源因手电筒透镜而异(窄[N]，平均[X]，并放大[Z]）和紫外线强度（X和X高）。工作参数包括距离(20-300mm)和角度(15-70°)。指定视觉评分以确定可辨别性。
结果:平均激发最大值为384nm。荧光随着更直接的UV光暴露而增加。用50mm和70°的LightXHigh记录最高强度。视觉评估遵循图像分析趋势，对于所有25μm厚的样品，荧光在临床上是可辨别的。
结论:395-405nm的激发波长范围适合于FIT照明。所有的树脂都是各向异性的，并显示更大的荧光与更大的角度，更高的紫外线强度，更接近。
方法：这项体外研究使用分光光度法评估了五种荧光正畸树脂和一种非荧光对照树脂，对25μm厚的树脂进行缩放图像分析，以比较强度，和视觉评估。光源因手电筒透镜而异(窄[N]，平均[X]，并放大[Z]）和紫外线强度（X和X高）。工作参数包括距离(20-300mm)和角度(15-70°)。指定视觉评分以确定可辨别性。
结果:平均激发最大值为384nm。荧光随着更直接的UV光暴露而增加。用50mm和70°的LightXHigh记录最高强度。视觉评估遵循图像分析趋势，对于所有25μm厚的样品，荧光在临床上是可辨别的。
结论:395-405nm的激发波长范围适合于FIT照明。所有的树脂都是各向异性的，并显示更大的荧光与更大的角度，更高的紫外线强度，更接近。
