Department of Prosthodontics, Faculty of Dentistry, Hatay Mustafa Kemal University, Antakya, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
J Esthet Restor Dent. 2020 Jul;32(5):530-535. doi: 10.1111/jerd.12580. Epub 2020 Mar 17.
The aim of this study was to investigate the color change, translucency, and whiteness index of three different resin matrix ceramics and a resin composite subjected to different bleaching agents.
Twenty disc-shaped specimens (A2 shaded) for three different resin matrix ceramic brands (Groups Ena, Ulti, and Cera) (totally 60) were prepared using the CAD/CAM technique and 20 nanofiller composite specimens (Group Comp) (A2 shaded) with the same dimensions were prepared as the control group. The color change (∆E ), relative translucency parameter (RTP), and whiteness index (WI ) of the specimens initial and after different bleaching procedures (home-bleaching and office-bleaching) were calculated using ∆E , TP , and WI formulas. Two-way analysis of variance (ANOVA) and multiple comparison test with Bonferroni correction (α = .05) at the significance level of P < .05 were performed for the comparisons of ∆E values. The RTP and WI values were evaluated by using repeated measures ANOVA and multiple-comparison test with Bonferroni corrections (α = .05) at the significance level of P < .05.
Bleaching procedure and material type were found to be significant regardless of bleaching type for RTP and WI values. Material type has a significant effect on the ∆E values. The highest color change values were determined in Group Comp (P < .05).
Bleaching procedures significantly affected the RTP values of Groups Ulti and Cera (P < .05). ∆E values for the resin matrix ceramics after the bleaching procedures were below the clinically acceptable values, regardless of the bleaching agent.
Optically, materials such as resin matrix ceramics have properties different from not only enamel and dentin but also among themselves. The possible effect of bleaching agents on these materials should be considered carefully while choosing the restorative material.
本研究旨在研究三种不同树脂基质陶瓷和一种树脂复合材料在不同漂白剂作用下的颜色变化、半透明度和白度指数。
使用 CAD/CAM 技术制作了 20 个 A2 色阴影的圆盘状试件（共 60 个），用于三种不同的树脂基质陶瓷品牌（Ena、Ulti、Cera 组），并制备了 20 个具有相同尺寸的纳米复合试件（Comp 组）作为对照组。使用 ∆E、TP 和 WI 公式计算了试件初始和不同漂白程序（家庭漂白和办公室漂白）后的颜色变化（∆E）、相对半透明度参数（RTP）和白度指数（WI）。使用双向方差分析（ANOVA）和 Bonferroni 校正的多重比较检验（α =.05）在 P < .05 的显著性水平下比较了 ∆E 值。使用重复测量方差分析和 Bonferroni 校正的多重比较检验（α =.05）在 P < .05 的显著性水平下评估了 RTP 和 WI 值。
无论漂白类型如何，漂白程序和材料类型对 RTP 和 WI 值均有显著影响。材料类型对 ∆E 值有显著影响。在 Comp 组中，颜色变化值最高（P < .05）。
无论漂白剂如何，漂白程序显著影响 Ulti 和 Cera 组的 RTP 值（P < .05）。树脂基质陶瓷在漂白程序后的 ∆E 值低于临床可接受值，无论漂白剂如何。
光学上，树脂基质陶瓷等材料的性能不仅与牙釉质和牙本质不同，而且彼此之间也不同。在选择修复材料时，应仔细考虑漂白剂对这些材料的可能影响。
