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首页> 外文期刊>American journal of dentistry >Effect of hydrogen peroxide on microhardness and color change of resin nanocomposites.
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Effect of hydrogen peroxide on microhardness and color change of resin nanocomposites.

机译：过氧化氢对树脂纳米复合材料显微硬度和颜色变化的影响。

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摘要

PURPOSE: To examine the effect of hydrogen peroxide on the microhardness and color change of resin composites containing nanofillers. METHODS: Three resin nanocomposites with three different shades and two different tooth whitening agents were used. The specimens were given a 3-week treatment with one of three protocols: (1) 7 hours/day treatment of carbamide peroxide (CP) + 17 hours/day immersion in distilled water (DW); (2) 1 hour/week treatment of hydrogen peroxide (HP) + immersion in DW for the rest of the week; and (3) immersion in DW for 24 hours/day. The microhardness and color changes were measured after treatment. RESULTS: After treatment with the whitening agents, there was an 8.1-10.7% decrease in the original microhardness. These values were similar to those obtained from the samples treated with distilled water. In the same resin product, the decrease was similar regardless of the test agents used. In most cases, the color change was only slight (deltaE*=0.5-1.4). Hydrogen peroxide enhanced the color change but the absolute color change values were similar in the same product and shade, regardless of the test agent used.
机译：目的：研究过氧化氢对含纳米填料的树脂复合材料的显微硬度和颜色变化的影响。方法：使用三种具有三种不同色调和两种不同牙齿增白剂的树脂纳米复合材料。用以下三种方案之一对样品进行3周处理：（1）每天7小时/天的过氧化脲（CP）处理+ 17小时/天的蒸馏水（DW）浸泡; （2）在一周的剩余时间内，每周进行1小时的过氧化氢（HP）处理+浸入DW中; （3）每天浸入DW中24小时。处理后测量显微硬度和颜色变化。结果：用增白剂处理后，原始显微硬度降低了8.1-10.7％。这些值类似于从用蒸馏水处理过的样品中获得的值。在相同的树脂产品中，无论使用何种测试剂，其下降幅度均相似。在大多数情况下，颜色变化很小（deltaE * = 0.5-1.4）。过氧化氢增强了颜色变化，但是在相同的产品和阴影中，绝对的颜色变化值相似，而与所使用的测试剂无关。

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