Tango Rubens Nisie, Todorović Ana, Stamenković Dejan, Karasan Duygu Narin, Sailer Irena, Paravina Rade Dušan
Department of Dental Materials and Prosthodontics, State University of Sao Paulo School of Dentistry at Sao Jose dos Campos, Sao Jose dos Campos, Brazil and Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, TX.
Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.
Acta Stomatol Croat. 2021 Mar;55(1):2-9. doi: 10.15644/asc55/1/1.
To evaluate different intervals of exposure to staining solutions and artificial aging on translucency parameter (TP) of CAD-CAM materials.
One millimeter thick square-shaped specimens (N = 288) were cut from Cerasmart (CS), IPS e.max (IE), Lava Ultimate (LU), Shofu HC (SH), Vita Enamic (VE), and Vita Suprinity (VS) and were divided into laboratory and chairside polishing. Reflection wavelength spectra, CIE D65 standard illuminant, 2 ° standard observer, SCI, UV included, SAV aperture, 6 mm diameter, were recorded at 10 nm sensitivity against white and black calibration tiles using a benchtop spectrophotometer. Subsequently, they were converted into CIEDE 2000 TP. After baseline measurements (T0), the specimens were divided as follows (n = 8): staining in coffee (C) and wine (W), for 60 (T1) and 120 hours (T2), and accelerated artificial aging (A). Artificial aging (ISO 4892-2 standard) was performed in two cycles of 150 KJ/m, for T1 and T2, respectively. TP measurements were repeated at T1 and T2. Data of TP retention were submitted to analysis of variance and Fisher's PLSD multiple comparison test (α=0.05).
Fisher's PLSD critical differences among materials, time intervals and staining/aging were 0.16, 0.11 and 0.11, respectively. SH showed the highest TP followed by LU > CS > IE = VS > VE. For all time intervals, the lowest TP retention was observed with C. W, and A presented similar values.
Translucency Parameter was a time and staining/aging-dependent material. In majority of cases, it decreased upon staining/aging.
评估不同时长的染色溶液暴露及人工老化对计算机辅助设计与制造（CAD-CAM）材料半透明参数（TP）的影响。
从Cerasmart（CS）、IPS e.max（IE）、Lava Ultimate（LU）、松风HC（SH）、维他耐美瓷（VE）和维他臻瓷（VS）中切割出1毫米厚的方形试样（N = 288），并分为实验室抛光和椅旁抛光两类。使用台式分光光度计，在包含紫外线的SCI模式下，以10纳米的灵敏度，针对白色和黑色校准瓷砖，记录反射波长光谱、CIE D65标准照明体、2°标准观察者视角、直径6毫米的SAV孔径。随后，将其转换为CIEDE 2000 TP。在基线测量（T0）后，将试样按以下方式分组（n = 8）：置于咖啡（C）和葡萄酒（W）中染色60小时（T1）和120小时（T2），以及加速人工老化（A）。分别对T1和T2进行两个150 KJ/m周期的人工老化（ISO 4892-2标准）。在T1和T2重复进行TP测量。将TP保留数据提交至方差分析和Fisher最小显著差异多重比较检验（α = 0.05）。
材料、时间间隔以及染色/老化之间的Fisher最小显著差异分别为0.16、0.11和0.11。SH的TP最高，其次是LU > CS > IE = VS > VE。在所有时间间隔内，C组的TP保留率最低。W组和A组呈现相似的值。
半透明参数是一种依赖于时间和染色/老化的材料特性。在大多数情况下，它会随着染色/老化而降低。
