Canay Senay, Cehreli Murat C
Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
J Prosthet Dent. 2003 May;89(5):474-8. doi: 10.1016/S0022391303001689.
Bleaching agents may affect the color of existing composite restorations.
The purpose of this study was to compare the effect of 10% carbamide peroxide and 10% hydrogen peroxide on the color of light-polymerized hybrid, macrofilled, and polyacid-modified composites.
Two light-polymerized hybrid composites (3M Valux and Spectrum TPH), 1 macrofilled condensable composite (Solitaire), and 2 polyacid-modified composites (Dyract AP and Compoglass) were used. The hybrid composites served as controls. The color of 8 specimens of each material was analyzed by use of a spectrophotometer before bleaching. The specimens were then divided randomly into 2 subgroups (n=4). One group was immersed in 10% carbamide peroxide solution and the other in 10% hydrogen peroxide, for 8 hours each for 14 consecutive days. After bleaching, color changes (Delta E) were determined for each material and compared by use of the Kruskal-Wallis test, followed by the Mann-Whitney U test (P<.05).
After bleaching with carbamide peroxide, the color changes (Delta E) for Dyract AP (2.18; SD = 1.41), Compoglass (1.14; SD = 0.26) and Solitaire (1.56; SD = 0.89) were higher than the color changes recorded for 3M Valux (0.63; SD = 3.60), and Spectrum TPH (0.66; SD = 1.24). The differences between materials bleached with carbamide peroxide were not statistically significant. After bleaching with hydrogen peroxide, the color changes for Dyract AP (9.39; SD = 0.53) and Compoglass (5.15; SD = 0.52) were higher than the changes recorded for Spectrum TPH (4.53; SD = 1.53) and 3M Valux (3.41; SD = 4.40), whereas the color change of Solitaire (3.69; SD = 0.57) was significantly higher than that of 3M Valux (P=.01). The color changes for all restorative materials tested were clinically detectable after the application of 10% hydrogen peroxide. However, clinically noticeable discoloration was observed only for Dyract AP treated with 10% carbamide peroxide.
In comparison to 10% carbamide peroxide, 10% hydrogen peroxide caused more color changes in the composites tested.
漂白剂可能会影响现有的复合树脂修复体的颜色。
本研究的目的是比较10%过氧化脲和10%过氧化氢对光固化混合型、大颗粒填料型和含氟复合树脂颜色的影响。
使用两种光固化混合型复合树脂（3M Valux和Spectrum TPH）、1种大颗粒填料型可压实复合树脂（Solitaire）以及2种含氟复合树脂（Dyract AP和Compoglass）。混合型复合树脂作为对照。在漂白前，使用分光光度计分析每种材料的8个样本的颜色。然后将样本随机分为2个亚组（n = 4）。一组浸泡在10%过氧化脲溶液中，另一组浸泡在10%过氧化氢中，每组连续浸泡8小时，共14天。漂白后，测定每种材料的颜色变化（ΔE），并使用Kruskal-Wallis检验进行比较，随后进行Mann-Whitney U检验（P <.05）。
用过氧化脲漂白后，Dyract AP（2.18；标准差 = 1.41）、Compoglass（1.14；标准差 = 0.26）和Solitaire（1.56；标准差 = 0.89）的颜色变化（ΔE）高于3M Valux（0.63；标准差 = 3.60）和Spectrum TPH（0.66；标准差 = 1.24）记录的颜色变化。用过氧化脲漂白的材料之间的差异无统计学意义。用过氧化氢漂白后，Dyract AP（9.39；标准差 = 0.53）和Compoglass（5.15；标准差 = 0.5）的颜色变化高于Spectrum TPH（4.53；标准差 = 1.53）和3M Valux（3.41；标准差 = 4.40）记录的变化，而Solitaire（3.69；标准差 = 0.57）的颜色变化显著高于3M Valux（P =.01）。在应用10%过氧化氢后，所有测试的修复材料的颜色变化在临床上均可检测到。然而，仅在用10%过氧化脲处理的Dyract AP中观察到临床上明显的变色。
与10%过氧化脲相比，10%过氧化氢在测试的复合树脂中引起更多的颜色变化。
