Influence of thickness on color, translucency, and fluorescence of bioactive restorative materials.

IF 0.9 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

American journal of dentistry Pub Date : 2025-04-01

Ítalo C Carvalho, Rayssa C Barbosa, Carlos R G Torres, Alessandra B Borges, Mariane C Mailart

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引用次数: 0

Abstract

Purpose: To evaluate the influence of thickness on the color, translucency, and fluorescence of bioactive restorative materials.

Methods: Cylindrical specimens were prepared in 1 and 2 mm-thicknesses with bioactive materials (n= 12): bioactive composite (Activa BioACTIVE Restorative - ABR); alkasite (Cention N - CNN); glass-hybrid material (EQUIA Forte Fil - EFF); and bovine enamel/dentin - ED, as control. The color (CIELAB coordinates) of the specimens was measured using a spectrophotometer against a white and black background, and the translucency parameter (TP₀₀) was calculated. The fluorescence was assessed using a spectrofluorophotometer. Data were analyzed with two-way ANOVA and Tukey's test (α= 0.05).

Results: ABR and CNN exhibited reduced L*, a* and b* values over a white background at 2 mm compared with 1 mm. No differences in CIELAB coordinates were detected between the thicknesses when materials were measured against the black background. For both thicknesses, ABR exhibited the highest TP₀₀ values, and EFF the lowest. At 2 mm, CNN and ED presented similar translucency. ED showed the highest fluorescence values, followed by ABR, CNN, and EFF. The thickness influenced CIELAB parameters of the bioactive materials tested only when a white background was used. The bioactive composite exhibited a reduction in both L* and b* values as the thickness increased. In contrast, alkasite reduced only in L*, while glass-hybrid decreased in b*. As the thicknesses increased, the translucency parameter decreased for the bioactive restorative materials. The thicknesses had no effect on fluorescence of the materials.

Clinical significance: Variations in the thickness of bioactive materials affect CIELAB coordinates only when applied against a white background. Therefore, dentists should consider the intraoral background when using these materials. While thickness does not affect fluorescence, greater thickness reduces translucency.

本刊更多论文

厚度对生物活性修复材料颜色、透明度和荧光的影响。

目的：评价厚度对生物活性修复材料的颜色、半透明性和荧光性的影响。方法：用生物活性材料（n= 12）制备1和2 mm厚度的圆柱形标本：生物活性复合材料（Activa bioactive Restorative - ABR）；alkasite (N - CNN)；玻璃杂化材料（EQUIA Forte Fil - EFF）；和牛牙釉质/牙本质ED作为对照。在白色和黑色背景下，用分光光度计测量样品的颜色（CIELAB坐标），并计算半透明参数（TP 0）。使用荧光分光光度计评估荧光。数据分析采用双因素方差分析和Tukey检验（α= 0.05）。结果：在白色背景下，ABR和CNN在2 mm处的L*、a*和b*值较1 mm处有所降低。当材料在黑色背景下测量时，CIELAB坐标在厚度之间没有检测到差异。对于两种厚度，ABR的TP 0值最高，EFF的TP 0值最低。在2mm处，CNN和ED呈现相似的半透明。ED的荧光值最高，其次是ABR、CNN和EFF。只有在使用白色背景时，厚度才会影响被测生物活性材料的CIELAB参数。生物活性复合物的L*和b*值随厚度的增加而降低。相反，碱石矿只在L*中还原，而玻璃杂化在b*中还原。随着厚度的增加，生物活性修复材料的半透明参数减小。厚度对材料的荧光特性没有影响。临床意义：生物活性物质的厚度变化仅在白色背景下影响CIELAB坐标。因此，牙医在使用这些材料时应考虑口腔内的背景。虽然厚度不影响荧光，但较大的厚度会降低半透明性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

American journal of dentistry 医学-牙科与口腔外科

CiteScore

2.40

自引率

7.10%

发文量

审稿时长

1 months

期刊介绍： The American Journal of Dentistry, published by Mosher & Linder, Inc., provides peer-reviewed scientific articles with clinical significance for the general dental practitioner.