Lucena Cristina, Ruiz-López Javier, Pulgar Rosa, Della Bona Alvaro, Pérez María M
Department of Stomatology, Faculty of Dentistry, Colegio Máximo, University of Granada, Campus de Cartuja s/n, 18071, Granada, Spain.
Department of Optics, Faculty of Science, University of Granada, Campus Fuentenueva, Edificio Mecenas, s/n, 18071, Granada, Spain.
Dent Mater. 2021 May;37(5):840-848. doi: 10.1016/j.dental.2021.02.011. Epub 2021 Feb 28.
To evaluate optical properties, and translucency and opalescence parameters of one-shaded resin-based composites.
Three one-shaded resin composites (OM - Omnichroma; VP - Venus Pearl; and VD - Venus Diamond) and a group-shaded resin composite (FU- Filtek Universal A2) were used. Three composite discs from each material were fabricated for each of the following thickness: 0.5, 1.0 and 2.0 mm. Diffuse reflectance was measured against white and black backgrounds using a calibrated spectroradiometer, CIE D65 illuminant and the CIE 45°/0° geometry. Translucency parameter (TP) was calculated using ΔE and ΔE. Scattering (S) and absorption (K) coefficients and transmittance (T%) were calculated using Kubelka-Munk's equations, and a reflection spectrophotometer was used to measure the opalescence parameter (OP). Data was statistically analyzed using Kruskal-Wallis, Mann-Whitney tests, and VAF coefficient.
Spectral distributions of S, K and T were wavelength dependent, showing significant differences between materials of the same thickness and for different thicknesses of the same material (p < 0.001). OM showed the greatest translucency values for all thicknesses. Translucency decreased as thickness increased with statistically significant differences (p < 0.005). Values of ΔTP and ΔTP between thicknesses were above of translucency thresholds for all materials. VP and VD showed the lowest OP values.
One-shaded resin-based composites showed different optical behavior than the group-shaded resin-based composite. Understanding the optical behavior of the one-shaded resin-based composites is essential to optimize their clinical performance.
评估单色调树脂基复合材料的光学性能、半透明度和乳光参数。
使用三种单色调树脂复合材料（OM - Omnichroma；VP - Venus Pearl；和VD - Venus Diamond）以及一种组色调树脂复合材料（FU - Filtek Universal A2）。针对以下每种厚度（0.5、1.0和2.0毫米），为每种材料制作三个复合圆盘。使用校准的光谱辐射计、CIE D65光源和CIE 45°/0°几何条件，在白色和黑色背景下测量漫反射率。使用ΔE和ΔE计算半透明度参数（TP）。使用库贝尔卡 - 蒙克方程计算散射（S）和吸收（K）系数以及透光率（T%），并使用反射分光光度计测量乳光参数（OP）。使用克鲁斯卡尔 - 沃利斯检验、曼 - 惠特尼检验和VAF系数对数据进行统计分析。
S、K和T的光谱分布与波长相关，在相同厚度的材料之间以及相同材料的不同厚度之间显示出显著差异（p < 0.001）。OM在所有厚度下均显示出最大的半透明度值。随着厚度增加，半透明度降低，差异具有统计学意义（p < 0.005）。所有材料不同厚度之间的ΔTP和ΔTP值均高于半透明度阈值。VP和VD显示出最低的OP值。
单色调树脂基复合材料表现出与组色调树脂基复合材料不同的光学行为。了解单色调树脂基复合材料的光学行为对于优化其临床性能至关重要。
