我们能否使用半透明度参数来预测 CAD/CAM 陶瓷修复体的美学效果？
Can we use the translucency parameter to predict the CAD/CAM ceramic restoration aesthetic?
机构信息
Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, Shanghai, China; National Center for Stomatology, Shanghai, China; National Clinical Research Center for Oral Diseases, Shanghai, China; Shanghai Key Laboratory of Stomatology, Shanghai, China; Shanghai Research Institute of Stomatology, Shanghai, China.
Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China; College of Stomatology, Shanghai Jiao Tong University, Shanghai, China; National Center for Stomatology, Shanghai, China; National Clinical Research Center for Oral Diseases, Shanghai, China; Shanghai Key Laboratory of Stomatology, Shanghai, China; Shanghai Research Institute of Stomatology, Shanghai, China.
出版信息
Dent Mater. 2023 Mar;39(3):e1-e10. doi: 10.1016/j.dental.2023.01.002. Epub 2023 Feb 24.
OBJECTIVES
To evaluate the effects of background color, ceramic type and coping thickness on masking ability (ΔE) and translucency parameter (TP) of CAD/CAM lithium disilicate glass-ceramic/monolithic zirconia and, to determine the correlations between coping thickness, TP and ΔE.
METHODS
A total of 120 ceramic specimens (2 mm, 1 mm and 0.5 mm thickness; n = 10) of four CAD/CAM ceramics: IPS e.max, IPS ZirCAD, Upcera Li CAD and Upcera TT CAD, were studied. Specimens were tested over nine fabricated backgrounds: A1, A2, A3.5, ND2 and ND7 shade resin-based composites, cobalt-chromium alloy (CC), medium precious alloy (MPA), black (B) and white (W). CIELab values (L*, a* and b*), color difference (ΔE) and translucency parameter (TP) were measured and calculated using a digital spectrophotometer (color i7, X-Rite, Pantone®). Data were analyzed using the Shapiro-Wilk test, one-way ANOVA, three-way ANOVA, independent t-tests and Tukey post-hoc tests (p < 0.05).
RESULTS
2 mm CAD/CAM ceramics showed ideal color matching (ΔE<2.6) over different backgrounds, except for CC, B and W backgrounds. Monolithic zirconia had lower ΔE values than lithium disilicate glass-ceramics. ΔE and TP values significantly reduced with the increased coping thickness (p < 0.05). Regardless of ceramic type and thickness, a strong TP-SD of ΔE correlation was observed.
SIGNIFICANCE
CAD/CAM ceramic restoration color was significantly affected by background color, ceramic type and coping thickness. TP is a promising predictor for appropriate ceramic selection to receive an acceptable CAD/CAM ceramic restoration aesthetic.
目的
评估背景颜色、陶瓷类型和修复体厚度对 CAD/CAM 二硅酸锂玻璃陶瓷/整体氧化锆的遮蔽能力（ΔE）和透光率参数（TP）的影响，并确定修复体厚度、TP 和 ΔE 之间的相关性。
方法
共研究了 120 个陶瓷样本（2mm、1mm 和 0.5mm 厚度；n=10），来自 4 种 CAD/CAM 陶瓷：IPS e.max、IPS ZirCAD、Upcera Li CAD 和 Upcera TT CAD。测试样本在 9 种不同基底颜色上：A1、A2、A3.5、ND2 和 ND7 色光固化树脂复合材料、钴铬合金（CC）、中贵金属合金（MPA）、黑（B）和白（W）。使用数字分光光度计（color i7，X-Rite，Pantone®）测量并计算 CIELab 值（L*、a和 b）、色差值（ΔE）和透光率参数（TP）。使用 Shapiro-Wilk 检验、单因素方差分析、三因素方差分析、独立 t 检验和 Tukey 事后检验（p<0.05）进行数据分析。
结果
2mm CAD/CAM 陶瓷在不同基底上表现出理想的颜色匹配（ΔE<2.6），除了 CC、B 和 W 基底。整体氧化锆的 ΔE 值低于二硅酸锂玻璃陶瓷。随着修复体厚度的增加，ΔE 和 TP 值显著降低（p<0.05）。无论陶瓷类型和厚度如何，均观察到 TP 与 SD 之间存在强相关性。
意义
CAD/CAM 陶瓷修复体的颜色明显受到背景颜色、陶瓷类型和修复体厚度的影响。TP 是一种有前途的预测指标，可用于选择合适的陶瓷以获得可接受的 CAD/CAM 陶瓷修复体美学效果。
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