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首页> 外文期刊>The Journal of Prosthetic Dentistry >Color stability of sealed composite resin restorative materials after ultraviolet artificial aging and immersion in staining solutions.
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Color stability of sealed composite resin restorative materials after ultraviolet artificial aging and immersion in staining solutions.

机译：紫外线人工老化并浸入染色溶液后，密封的复合树脂修复材料的颜色稳定性。

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STATEMENT OF PROBLEM: The color alteration of resin-based materials is one of the most common reasons to replace esthetic dental restorations. PURPOSE: This study assessed the influence of surface sealant (Biscover) on the color stability of nanofilled (Supreme XT) and microhybrid (Vit-l-escence and Opallis) composite resins after artificial aging. MATERIAL AND METHODS: One hundred disc-shaped (6 x 1.5 mm) specimens were made for each composite resin. After 24 hours, all specimens were polished and sealant was applied to 50 specimens of each material. Baseline color was measured according to the CIE L*a*b* system using a reflection spectrophotometer. Ten specimens of each group were aged for 252 h in an ultraviolet (UV)-accelerated aging chamber or immersed for 4 weeks in cola soft drink, orange juice, red wine staining solutions or distilled water as control. Color difference (DeltaE) after aging was calculated based on the color coordinates before (baseline) and after aging/staining treatment. Data were analyzed with 2-way ANOVA and Fisher's test (alpha=.05). RESULTS: The results showed significant changes in color after artificial aging in all the groups (P<.05). Independent of the material studied, red wine resulted in the highest level of discoloration. Intermediate values were found for orange juice, UV accelerated aging, and the cola soft drink. The lowest values of DeltaE were found for specimens stored in distilled water. CONCLUSIONS: All composite resins showed some color alteration after the aging methods. The surface sealant did not alter the color stability of the tested materials.
机译：问题陈述：树脂基材料的颜色变化是替换美观的牙齿修复体的最常见原因之一。目的：本研究评估了表面密封剂（Biscover）对人工老化后的纳米填充（Supreme XT）和微杂化（Vit-1发光和蛋白石）复合树脂的颜色稳定性的影响。材料与方法：为每种复合树脂制作一百个圆盘状（6 x 1.5毫米）的样品。 24小时后，将所有样品抛光并在每种材料的50个样品上施加密封剂。基线颜色根据CIE L * a * b *系统使用反射分光光度计测量。每组十个标本在紫外线（UV）加速老化箱中老化252小时，或浸入可乐汽水，橙汁，红酒染色溶液或蒸馏水中4周作为对照。根据老化（染色）之前（基线）和之后的色坐标计算老化后的色差（DeltaE）。数据用2通ANOVA和Fisher检验（alpha = .05）进行分析。结果：结果表明，所有组的人为老化后，颜色均发生了显着变化（P <.05）。与所研究的材料无关，红酒导致最高的变色水平。发现橙汁，紫外线加速老化和可乐汽水的中间值。对于储存在蒸馏水中的样品，发现DeltaE最低。结论：所有复合树脂在老化方法后均显示出一些颜色变化。表面密封剂没有改变测试材料的颜色稳定性。

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