. Graduate Program in Dentistry, Federal University of Sergipe, Aracaju, SE, Brazil.
Department of Dentistry, Federal University of Sergipe, Aracaju, SE, Brazil.
Braz Dent J. 2024 Jul 22;35:5742. doi: 10.1590/0103-6440202405742. eCollection 2024.
This study evaluated the effects of surrounding and background shades on the color adjustment potential (CAP) and visual color match of two single-shade composites, Vittra APS Unique and Charisma Diamond One. Cylinder-shaped specimens were constructed, consisting of either single-shade composites alone (simple) or composites surrounded by the Forma material at shades A1 or A3 (dual). Simple specimens using only the Forma at the specified shades were also prepared. Color measurements of simple specimens were taken against a gray background using a spectrophotometer. For dual specimens, the color of the inner composite was measured against a gray or chromatic (the same shade as the outer composite) background. Color differences (ΔE00) between the single-shade composites and the A1/A3 composite were calculated. CAP was determined by comparing data from simple and dual specimens. Four experienced dentists scored the color match (perfect to unacceptable) for each specimen using a viewing booth illuminated by an illuminant D65. Data were analyzed with repeated-measures ANOVA and the Kruskal-Wallis test. The results showed that both single-shade composites showed the lowest color discrepancies when they were compared to A1 and A3. Using a chromatic background only significantly affected the CAP when the outer composite was A3. The visual analysis showed poor color matches between the single-shade and control chromatic composites, except for Charisma Diamond One surrounded by A1. In conclusion, the CAP values of the evaluated single-shade composites were impacted by both surrounding shade and background color, and the color match of these materials tended to be poor.
本研究评估了周围和背景色调对两种单色调复合材料（Vittra APS Unique 和 Charisma Diamond One）的颜色调整潜力（CAP）和视觉颜色匹配的影响。构建了圆柱形样本，由单色调复合材料单独组成（简单）或由 Forma 材料在 A1 或 A3 色调（双）周围包围的复合材料组成。还制备了仅使用指定色调的 Forma 的简单样本。使用分光光度计对简单样本的颜色在灰色背景下进行测量。对于双样本，内部复合材料的颜色是在灰色或彩色（与外部复合材料相同的色调）背景下测量的。计算了单色调复合材料与 A1/A3 复合材料之间的颜色差异（ΔE00）。通过比较简单和双样本的数据来确定 CAP。四位经验丰富的牙医使用 D65 照明体照亮的观察亭，根据每个样本的颜色匹配（完美到不可接受）进行评分。使用重复测量方差分析和 Kruskal-Wallis 检验对数据进行分析。结果表明，与 A1 和 A3 相比，两种单色调复合材料的颜色差异最小。仅使用彩色背景会显著影响当外部复合材料为 A3 时的 CAP。视觉分析显示，除了由 A1 包围的 Charisma Diamond One 外，单色调和对照色复合材料之间的颜色匹配较差。总之，评估的单色调复合材料的 CAP 值受到周围色调和背景颜色的影响，这些材料的颜色匹配往往较差。
