The effect of light curing source on the residual yellowing of resin composites
The effect of light curing source on the residual yellowing of resin composites
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DOI：
10.2341/06-129
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发表时间：
2007-09-01
影响因子：
2.2
通讯作者：
Rueggeberg, F. A.
中科院分区：
文献类型：
--
作者：
Brackett, M. G.;Brackett, W. G.;Rueggeberg, F. A.
目的。这项研究评估了用石英-钨-卤素(QTH)或蓝色发光二极管(LED)聚合时固化树脂复合材料中的残余黄色量。材料和方法：将12种不同色度(漂白到常规色调)的微填充、混杂和微混杂树脂复合试件(n=10)分别与两种光色进行聚合。所有材料都只含有樟脑酚作为光引发剂。暴露后，将标本在黑暗中保存24小时。然后，记录样品的颜色参数(L*、a*、b*和C*(Ab))，并通过检查测试组合之间的变化来确定色差(AE*(Ab))。使用方差分析和Tukey-Kramer后HOE检验进行组内比较，并使用预设α为0.05的学生t检验进行成对比较。结果：当注意到黄色色调的显著差异时，QTH灯产生的黄色色调比使用LED的大多数比较要大。就复合填料分类或色调而言，无法预测产生更多残留泛黄的可能性，因为这种影响可能更依赖于个别产品的组成。光固化单元之间的残余黄化差异的程度落在人眼可检测的水平内(AE>；2.0)。结论：选择光固化单元来聚合树脂基修复体材料对残留黄色量有显著影响，QTH光单元比LED单元更容易留下黄色。
Purpose. This study evaluated the amount of residual yellow in cured resin composites when polymerizing with either a quartz-tungsten-halogen (QTH) or blue light-emitting diode (LED). Material and Methods: Twelve shades (bleaching to conventional shades) of microfill, hybrid and microhybrid resin composite specimens (n=10) were polymerized with both light types. All the materials contained only camphorquinone as the photoinitiator. After exposure, the specimens were stored in the dark for 24 hours. Then, the specimen color parameters were recorded (L*, a*, b* and C*(ab)) and color differences (AE*(ab)) were determined by examining for changes among the test combinations. Group comparisons were examined using ANOVA and the Tukey-Kramer post-hoe test, and pairwise comparisons were made using the Student's t-tests at a pre-set alpha of 0.05. Results: When a significant difference in the shade of yellow was noted, the QTH light produced a greater yellow tinge than most comparisons using the LED. The potential for producing more residual yellowing could not be anticipated with respect to composite filler classification or shade, as this effect may be more dependent on individual product composition. The extent to which residual yellowing differences were noted between light curing units fell within levels considered detectable by the human eye (AE>2.0).Conclusion: The selection of light curing unit to polymerize resin-based restorative materials can have a significant influence on the amount of residual yellow present, with the QTH light tending to leave more yellow than an LED unit.