Baskent University, School of Dentistry, Department of Conservative Dentistry, 06490, Bahcelievler, Ankara, Turkey.
J Esthet Restor Dent. 2009;21(6):407-14. doi: 10.1111/j.1708-8240.2009.00299.x.
Effect of bleaching procedures on staining susceptibility of resin restorative materials is still questionable.
The aim of this study was to evaluate the staining susceptibility of restorative materials bleached with 20% carbamide peroxide home bleaching agent and subsequently immersed in coffee and tea.
Forty-two disk-shaped specimens were fabricated for each of the resin composites (Filtek Supreme XT [3M ESPE, St. Paul, MN, USA], Ceram-X Mono [Dentsply, Konstanz, Germany], and Aelite All Purpose Body [BISCO, Inc., Shaumburg, IL, USA]). The baseline color values were measured with a spectrophotometer. The specimens of each restorative material were randomly divided into two groups (N = 21). While the first group specimens were stored in distilled water (nonbleaching group-control), bleaching agent (Opalescence PF 20% [Ultradent Poducts, South Jordan, UT, USA]) was applied on the top surface of each specimen of the second group (bleaching group). After color change values were measured, the specimens were randomly divided into three subgroups (N = 7) according to the staining solutions. The color change values (DeltaE*ab) were calculated and the data were subjected to analysis of variance. Statistical significance was declared if the p value was 0.05 or less.
There was no statistically significant difference within each restorative material's DeltaEab values after bleaching (p = 0.714). Also, the staining solutions did not cause a statistically significant difference between DeltaEab values of bleaching compared with nonbleaching groups (p = 0.146). Significant interaction was found only between restorative materials and staining solutions (p = 0.000).
Bleaching of the tested resin composites did not increase their susceptibility to extrinsic staining in vitro. CLINICAL SIGNIFICANCE Bleaching did not affect staining susceptibility of the tested resin composite restorative materials. (J Esthet Restor Dent 21:407-415, 2009).
漂白程序对树脂修复材料的染色易感性的影响仍存在疑问。
本研究旨在评估用 20%过氧化脲家用漂白剂漂白并随后浸泡在咖啡和茶中的修复材料的染色易感性。
为每种树脂复合材料（Filtek Supreme XT[3M ESPE，圣保罗，MN，美国]、 Ceram-X Mono[Dentsply，康斯坦茨，德国]和 Aelite All Purpose Body[BISCO，Inc.，绍姆堡，IL，美国]）制作了 42 个圆盘形样本。用分光光度计测量基线颜色值。将每种修复材料的标本随机分为两组（N=21）。第一组标本储存在蒸馏水中（非漂白组-对照），第二组标本的上表面涂抹漂白剂（Opalescence PF 20%[Ultradent Poducts，南约旦，UT，美国]）。测量颜色变化值后，根据染色溶液将标本随机分为三组（N=7）。计算颜色变化值（DeltaE*ab），并对数据进行方差分析。如果 p 值小于或等于 0.05，则表示有统计学意义。
在每个修复材料的 DeltaEab 值漂白后，没有统计学上的显著差异（p=0.714）。此外，与非漂白组相比，染色溶液也没有导致漂白组的 DeltaEab 值之间出现统计学上的显著差异（p=0.146）。仅在修复材料和染色溶液之间发现了显著的相互作用（p=0.000）。
在体外，漂白未增加测试的树脂复合材料对继发染色的易感性。临床意义：漂白未影响测试的树脂复合修复材料的染色易感性。（J Esthet Restor Dent 21:407-415，2009）。
