Purpose

To determine the curing potential and color stability of resin-based luting materials for aesthetic restorations.

Material and Methods

Four resin-based luting agents were tested: traditional dual-activated resin cement (RelyX ARC, ARC), amine-free dual-activated resin cement (RelyX Ultimate, ULT), light-activated resin cement (RelyX Veneer, VEN), and pre-heated restorative resin composite (Filtek Supreme, PHC). Degree of C = C conversion was determined by infrared spectroscopy (n = 3) with direct light exposure or with interposition of 1.5-mm-thick ceramic (e.max Press HT) between the luting material and light. The curing potential considered the ratio between these two scenarios. Color difference (n = 6) was determined by CIELAB (ΔE_ab) and CIEDE2000 (ΔE₀₀) methods, by spectrophotometer measurements made 24 h after photoactivation and 90 days after storage in water. Data was submitted to ANOVA and Tukey’s test (α = 0.05).

Results

The luting agents affected both conversion and color stability. With ceramic, ARC produced the highest conversion among the tested groups (75 ± 1%) and the pre-heated composite (PHC) the lowest one (51 ± 3%), but the curing potential was similar for all materials. ULT produced lower ΔE_ab than ARC. PHC presented the lowest color difference when considered both CIELAB and CIE2000 methods (ΔE_ab 2.1 ± 0.4; ΔE₀₀ 1.6 ± 0.2).

Significance

All luting strategies presented high curing potential. Amine-free dual-activated material was able to reduce color difference than that formulated with the amine component. Pre-heated composite produced the least color variation after storage.

中文翻译：

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不同树脂基胶粘材料的固化潜力和颜色稳定性。

目的

确定用于美学修复的树脂基胶合材料的固化潜力和颜色稳定性。

材料与方法

测试了四种基于树脂的助粘剂：传统的双活化树脂胶（RelyX ARC，ARC），无胺双活化树脂胶（RelyX Ultimate，ULT），光活化树脂胶（RelyX Veneer，VEN）和预热的恢复性树脂复合材料（Filtek Supreme，PHC）。C = C转换的程度是通过红外光谱法（n = 3）在直接曝光或在诱饵材料和光之间插入1.5毫米厚的陶瓷（例如max Press HT）确定的。固化潜力考虑了这两种情况之间的比率。通过CIELAB（ΔE _ab）和CIEDE2000（ΔE ₀₀）确定色差（n = 6））方法，通过分光光度计在光活化后24小时和储存在水中90天后进行测量。将数据提交给方差分析和Tukey检验（α= 0.05）。

结果

助剂影响转化率和颜色稳定性。对于陶瓷，ARC在测试组中产生最高的转化率（75±1％），而预热的复合材料（PHC）则产生最低的转化率（51±3％），但是所有材料的固化潜力均相似。ULT产生的ΔE _ab低于ARC。当同时考虑CIELAB和CIE2000方法时，PHC呈现出最低的色差（ΔE _ab 2.1±0.4；ΔE ₀₀ 1.6±0.2）。

意义

所有的胶粘策略都具有很高的固化潜力。与胺组分相比，无胺双活化材料能够减少色差。储存后，预热的复合材料产生的颜色变化最小。