Borges Ab, Caneppele Tmf, Luz M, Pucci Cr, Torres Crg
Oper Dent. 2014 Jul-Aug;39(4):433-40. doi: 10.2341/13-150-L.
PURPOSE : The aim of this study was to investigate the staining behavior of demineralized enamel infiltrated by low-viscosity resin. METHODS AND MATERIALS : Bovine enamel/dentin cylindrical samples (3 × 2 mm) were assigned into four groups (n=45) according to the enamel treatment: sound enamel (control), demineralization + artificial saliva, demineralization + daily application of 0.05% NaF, demineralization + resin infiltration (Icon, DMG). Artificial white spot lesions were produced in groups with demineralization. After the treatments, color was assessed by spectrophotometry, using the CIE Lab* system. The specimens (n=15) were then immersed in deionized water, red wine, or coffee for 10 minutes daily for eight days. Color was measured again, and the specimens were repolished with sandpaper discs. The final color was assessed. Data were analyzed by two-way analysis of variance and Tukey tests (α=0.05). A paired t-test was used for comparison between staining and repolishing conditions. RESULTS : There were significant differences for surface treatment and dye after staining and repolishing. Immersion in wine and coffee resulted in significantly increased color alteration (ΔE) compared with water (p=0.001). The resin-infiltrated group exhibited the highest staining values (p=0.001). The repolishing procedures resulted in significantly decreased color change.
The exposure of specimens to colored solutions resulted in significant color alteration. The demineralized enamel treated with resin infiltration showed significantly higher staining than all other tested groups; however, the repolishing of the specimens minimized the staining effect.
目的：本研究旨在调查低粘度树脂渗入脱矿釉质后的染色行为。方法和材料：将牛牙釉质/牙本质圆柱形样本（3×2毫米）根据釉质处理方式分为四组（n = 45）：完好釉质（对照组）、脱矿+人工唾液、脱矿+每日应用0.05%氟化钠、脱矿+树脂渗入（Icon，DMG）。在脱矿组中产生人工白斑病变。处理后，使用CIE Lab*系统通过分光光度法评估颜色。然后将样本（n = 15）每天在去离子水、红酒或咖啡中浸泡10分钟，持续8天。再次测量颜色，并使用砂纸盘对样本进行重新抛光。评估最终颜色。数据通过双向方差分析和Tukey检验进行分析（α = 0.05）。使用配对t检验比较染色和重新抛光条件。结果：染色和重新抛光后，表面处理和染料存在显著差异。与水相比，浸泡在红酒和咖啡中导致颜色变化（ΔE）显著增加（p = 0.001）。树脂渗入组表现出最高的染色值（p = 0.001）。重新抛光程序导致颜色变化显著降低。结论：样本暴露于有色溶液中导致显著的颜色改变。经树脂渗入处理的脱矿釉质显示出比所有其他测试组显著更高的染色；然而，样本的重新抛光使染色效果最小化。
