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首页> 外文期刊>Biomaterials >Knoop hardness of ten resin composites irradiated with high-power LED and quartz-tungsten-halogen lights.
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Knoop hardness of ten resin composites irradiated with high-power LED and quartz-tungsten-halogen lights.

机译：大功率LED和石英钨卤素灯照射的十种树脂复合材料的努氏硬度。

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摘要

This study compared a high-power light-emitting-diode (LED) curing light (FreeLight 2, 3M ESPE) with a quartz-tungsten-halogen (QTH) light (TriLight, 3M ESPE) to determine which was the better at photo-polymerising 10 resin composites. Class I preparations were prepared 4-mm deep into human teeth and filled with 10 different composites. The composites were irradiated for 50% or 100% of their recommended times using the LED light, and for 100% of their recommended times with the QTH light on either the high or medium power setting. Fifteen minutes later, the Knoop hardness of the composites was measured to a depth of 3.5mm from the surface. When irradiated by the LED light for their recommended curing times, the Knoop hardness of all 10 composites stayed above 80% of the maximum hardness of the composite to a depth of at least 1.5mm; three composites maintained a Knoop hardness that was more than 80% of their maximum hardness to a depth of 3.5mm. Repeated measurements analysis of variance indicated thatall the two-way and three-way interactions between the curing light, depth, and composite were significant (p<0.01). To eliminate the choice of composite as a factor, an overall comparison of the lights was performed using the Kruskal-Wallis test and distribution free multiple comparisons of the ranked hardness values. The LED light, used for the composite manufacturer's recommended time, was ranked the best at curing the composites to a depth of 3mm (p<0.01). The LED light used for 50% of the recommended time was not significantly different from the QTH light used for 100% of the recommended time on the high power setting.
机译：这项研究将高功率发光二极管（LED）固化光（FreeLight 2、3M ESPE）与石英钨卤素（QTH）光（TriLight，3M ESPE）进行了比较，以确定哪种在光敏性方面更好。聚合10种树脂复合材料。 I类制剂制备成距人牙齿4毫米深，并填充10种不同的复合材料。在高功率或中功率设置下，使用LED灯对复合材料的建议时间为50％或100％，对于QTH灯，复合材料的建议时间为100％。 15分钟后，测量复合材料的努氏硬度至距表面3.5mm的深度。当用LED灯照射其建议的固化时间时，所有10种复合材料的努氏硬度均保持在复合材料最大硬度的80％以上，且深度至少为1.5mm。三种复合材料的努氏硬度均达到最大硬度的80％以上，深度为3.5mm。重复测量方差分析表明，固化光，深度和复合材料之间的所有双向和三向交互作用均显着（p <0.01）。为了消除选择复合材料作为一个因素，使用Kruskal-Wallis测试对灯光进行了整体比较，并对排名的硬度值进行了无分布的多次比较。在复合材料制造商建议的时间内使用的LED灯在将复合材料固化至3mm的深度方面排名最佳（p <0.01）。在高功率设置下，建议时间的50％使用的LED灯与建议时间的100％使用的QTH灯没有明显不同。

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