Translucency Parameters and Masking Abilities of Monolithic CAD/CAM Ceramics.

Engin Esentürk, Merve Bankoğlu Güngör, Bilge Turhan Bal, Seçil Karakoca Nemli
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Abstract

Purpose: To compare the translucency parameters and masking abilities of different monolithic CAD/CAM ceramics placed on different-colored substructures.

Materials and methods: Square-shaped specimens (12 × 12 × 1.5 mm) were prepared from feldspathic (C), leucite (EMP), lithium disilicate (e.max), zirconiareinforced lithium silicate (VS), resin nanoceramic (LU), polymer-infiltrated ceramic (VE), hybrid nanoceramic (GC), monolithic zirconia (TZI), and composite resin (TC) blocks (n = 10 per material). After mechanical polishing, the translucency parameter (TP) was calculated. Then, each ceramic specimen was measured on eight substructures, and the color difference between ND2 and each substrate was calculated with the CIEDE2000 formula. TP values were analyzed with one-way ANOVA and Games-Howell tests, and the color differences indicating masking ability were analyzed with two-way ANOVA and Tukey HSD tests.

Results: The highest TP was observed in TC, followed by LU, EMP, C,GC, e.max, VS, VE, and TZI. The ΔE00 color difference values of TZI, VS, and VE on all abutment colors, except for ND9, were below the acceptable threshold value.

Conclusions: All monolithic ceramic materials used in the study masked the ND1 and ND3 substrates. The ND9, representing severely discolored or devitalized preparations, could not be masked by any monolithic CAD/CAM ceramics used in the study.

单片CAD/CAM陶瓷的半透明参数和掩模能力。
目的:本研究的目的是比较放置在不同颜色亚结构上的不同单片CAD-CAM陶瓷的半透明参数和掩蔽能力。材料和方法:由长石(C)、亮氨酸(Emp)、二硅酸锂(e.max)、氧化锆增强硅酸锂(VS)、树脂纳米陶瓷(LU)、聚合物渗透陶瓷(VE)、纳米颗粒-树脂杂化物(GC)、单片氧化锆(TZI)和复合树脂(TC)块(n=10)制备方形试样(12x12x1.5mm)。在机械抛光之后,计算半透明性参数(TP)。然后,在8个子结构上测量每个陶瓷样品,并用CIEDE2000公式计算ND2和每个基底之间的色差。TP值用单向ANOVA和Games-Howell检验进行分析,指示掩蔽能力的色差用双向ANOVA或Tukey HSD检验进行分析。结果:TP在TC中最高,其次是LU、Emp、C=GC、e.max、VS、VE和TZI。除ND9外,所有桥台颜色的TZI、VS和VE的∆E00色差值均低于可接受的阈值。结论:研究中使用的所有单片陶瓷材料都掩盖了ND1和ND3基底。ND9代表严重变色或失活的制剂,不能被研究中使用的任何单片CAD-CAM陶瓷掩盖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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