Health Sciences PhD Program, Universidad Católica de Murcia UCAM, Murcia, Spain.
Interdisciplinary Research Center Egas Moniz (Ciiem), Instituto Universitário Egas Moniz (IUEM), Almada, Portugal.
Clin Exp Dent Res. 2022 Feb;8(1):257-261. doi: 10.1002/cre2.524. Epub 2022 Jan 9.
The purpose of this study is to evaluate the color changes of lithium disilicate ceramics when cemented with different brands of cement by varying the thickness of the ceramic.
Forty ceramic discs, shade A2, were fabricated with 0.5 and 0.8 mm thickness. Forty composite resin discs, shade A3, were also produced. The ceramic samples were cemented to the composite resin discs, with two colors of resin cement, Neutral and Warm. A spectrophotometer evaluation was made. Translucency and color change analysis was performed by calculating the ΔE. A two-way analysis of variance test and multiple comparisons were performed using the Bonferroni method with a 95% confidence interval.
There are statistically significant differences between the two ceramic thicknesses with different brands of cement (p < .001). In addition, using the translucency analysis it was found that there are statistically significant differences between the two ceramic thicknesses in both types of cement (p < .001).
The use of different cementation materials on lithium disilicate ceramics appears to have little visible influence at the clinical level. Different ceramic thicknesses have a clinically visible influence on the final restoration color.
本研究旨在评估不同品牌的粘结剂在不同陶瓷厚度下对锂硅瓷颜色变化的影响。
制备 0.5 和 0.8mm 两种厚度的 A2 色锂硅瓷 40 个，同时制作 A3 色复合树脂 40 个。将陶瓷样本粘结到复合树脂样本上，使用两种颜色的树脂粘结剂（中性和暖色）进行粘结。用分光光度计进行评估。通过计算ΔE 进行半透光度和颜色变化分析。采用 Bonferroni 法进行双因素方差分析和多重比较，置信区间为 95%。
不同品牌的粘结剂在两种陶瓷厚度之间存在统计学差异（p<0.001）。此外，通过半透光度分析发现，两种类型的粘结剂在两种陶瓷厚度之间均存在统计学差异（p<0.001）。
在临床水平上，不同的粘结材料对锂硅瓷的影响似乎不明显。不同的陶瓷厚度对最终修复体的颜色有明显的影响。
