Statement of problem

Mouth rinses are known to stain tooth surfaces. However, their staining effect on different ceramics after prolonged use and the effect of polishing after staining are still unclear.

Purpose

The purpose of this in vitro study was to evaluate the stainability of different ceramic materials against different mouth rinses and the effect of polishing on staining.

Material and methods

Forty disk-shaped specimens were prepared from each material (total of 160 specimens): lithium disilicate (IPS e.max CAD), zirconia-reinforced lithium disilicate (VITA SUPRINITY PC), leucite-reinforced feldspar (GC Initial LRF), and resin matrix ceramic (CERASMART). Baseline color measurements (T0) were recorded with a clinical spectrophotometer (VITA Easyshade V). The specimens were immersed in chlorhexidine gluconate (CHX) 0.2% mouth rinse (Klorhex), (KLO) chlorhexidine gluconate 0.1% mouth rinse (Eludril) (ELU), a daily mouth rinse (LISTERINE Cool Mint) (LIS), artificial saliva (CON) continuously for 7 days (T1), 14 days (T2), and 28 days (T3). Discoloration values (ΔE) between the immersion time points (T0,T1,T2,T3) were calculated by using the following formula: ΔE= ([ΔL∗]² + [Δa∗]² + [Δb∗]²)^1/2. After the immersion process, specimens were polished and ΔE values remeasured. The Kruskal-Wallis and Mann-Whitney U tests were performed (α=.05) and were adjusted by postanalysis Bonferroni testing.

Results

KLO caused the highest ΔE values in all groups. IPS e.max CAD had the lowest ΔE values, and CERASMART showed the highest ΔE values against all of the solutions (P<.05). However, polishing caused a decrease in the ΔE values in all groups.

Conclusions

Prolonged use of mouth rinses may cause color change in different ceramic materials. Polishing affected the color change and resulted in a decrease in ΔE values. Mouth rinses containing CHX should be recommended with caution for daily use.

中文翻译：

---

不同陶瓷材料对漱口水的染色性和染色后抛光效果

问题陈述

众所周知，漱口水会污染牙齿表面。然而，它们在长时间使用后对不同陶瓷的染色效果以及染色后抛光的效果尚不清楚。

目的

这项体外研究的目的是评估不同陶瓷材料对不同漱口水的染色性以及抛光对染色的影响。

材料与方法

由每种材料制备 40 个盘状试样（共 160 个试样）：二硅酸锂（IPS e.max CAD）、氧化锆增强二硅酸锂（VITA SUPRINITY PC）、白榴石增强长石（GC Initial LRF）和树脂基质陶瓷（CERASMART）。使用临床分光光度计 (VITA Easyshade V) 记录基线颜色测量值 (T0)。将标本浸入葡萄糖酸氯己定 (CHX) 0.2% 漱口水 (Klorhex)、(KLO) 葡萄糖酸氯己定 0.1% 漱口水 (Eludril) (ELU)、每日漱口水 (LISTERINE Cool Mint) (LIS)、人工唾液 ( CON) 连续 7 天 (T1)、14 天 (T2) 和 28 天 (T3)。浸渍时间点 (T0,T1,T2,T3) 之间的变色值 (ΔE) 使用以下公式计算：ΔE= ([ΔL∗] ²  + [Δa∗] ² + [Δb∗] ² ) ^1/2。浸渍过程后，对试样进行抛光并重新测量 ΔE 值。进行了 Kruskal-Wallis 和 Mann-Whitney U 检验 (α=.05)，并通过分析后 Bonferroni 检验进行了调整。

结果

KLO 导致所有组中的最高 ΔE 值。IPS e.max CAD 的 ΔE 值最低，而 CERASMART 对所有溶液显示出最高的 ΔE 值 ( P <.05)。然而，抛光导致所有组的 ΔE 值下降。

结论

长时间使用漱口水可能会导致不同陶瓷材料的颜色发生变化。抛光会影响颜色变化并导致 ΔE 值降低。建议在日常使用中谨慎使用含有 CHX 的漱口水。