Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam 32210, Saudi Arabia.
Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam 32210, Saudi Arabia.
Int J Environ Res Public Health. 2021 Dec 18;18(24):13359. doi: 10.3390/ijerph182413359.
Shade matching is a common challenge that dentists face during fabrication of esthetic dental restoration. Thus, the aim of the current study was to assess the masking ability of two types of CAD/CAM ceramics for gaining high esthetic prosthesis. This in vitro study used a total sample size of 66 lithium disilicate (LD) and leucite reinforced (LR) CAD/CAM ceramics sub-grouped into three thicknesses: 0.5, 1, and 1.5 mm. Nine shades of natural dentin die materials were prepared as a replica of the underlying tooth structure. The difference in color (ΔE) and translucency parameter (TP) were assessed for both tested ceramics at the three thicknesses. One-way ANOVA was performed to compare the three thicknesses of each ceramic, followed by multiple pairwise comparisons between both ceramics. LR had significantly higher ΔE than LD at all thicknesses used unlike the case in TP. Thickness of 0.5 mm exhibited the highest ΔE and TP, while 1.5 mm thickness showed the lowest ΔE and TP in both ceramics. Increase in ceramic thickness had a great impact on both color masking ability of the underlying tooth structure and its translucency. The higher the ceramic thickness, the better the masking ability and the lower the translucency was reported.
遮色匹配是牙医在制作美学修复体时面临的常见挑战。因此，本研究的目的是评估两种类型的 CAD/CAM 陶瓷在获得高美学修复体方面的遮色能力。本体外研究使用了总共 66 个锂硅石（LD）和透锂长石增强（LR）CAD/CAM 陶瓷样本，分为三种厚度：0.5、1 和 1.5 毫米。制备了 9 种天然牙本质色的模具材料作为底层牙结构的复制品。在三种厚度下评估了两种测试陶瓷的颜色差异（ΔE）和半透明度参数（TP）。对每种陶瓷的三种厚度进行了单向方差分析，然后对两种陶瓷进行了多次两两比较。与 TP 不同，所有使用的厚度下，LR 的 ΔE 均明显高于 LD。0.5 毫米厚度表现出最高的 ΔE 和 TP，而在两种陶瓷中，1.5 毫米厚度表现出最低的 ΔE 和 TP。陶瓷厚度的增加对底层牙结构的颜色遮色能力及其半透明度有很大影响。陶瓷厚度越高，遮色能力越好，半透明度越低。
