Doray Pamela G, Eldiwany Magda S, Powers John M
Department of Restorative Dentistry, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, USA.
J Esthet Restor Dent. 2003;15(4):244-9; discussion 249-50. doi: 10.1111/j.1708-8240.2003.tb00292.x.
Resistance to staining is desirable to maintain the esthetic appearance of a provisional material. A resin sealant may improve stain resistance.
Color changes of a resin composite provisional material were measured by reflection spectrophotometry after storage in three staining solutions and water to determine stain resistance when treated with three methacrylate or urethane dimethacrylate resin surface sealants and when left untreated.
Specimens of a resin composite provisional material received one of three resin sealants (Fortify Plus, Bisco, Inc., Schaumburg, IL; Jet Seal, Lang Dental Manfacturing, Wheeling, IL; Triad LC, Dentsply International, York, PA, USA) or no surface sealer and then were stored for 72 hours in one of four staining solutions (water [control], black coffee, cranberry juice, red wine). Color was measured by CIE Lab* on a reflection spectrophotometer (Color-Eye 7000, Macbeth Division, Kollmorgen Instruments, Newburgh, NY, USA) at baseline and after storage. Color change (deltaE*) was calculated and analyzed statistically by two-factor analysis of variance, with four solutions and four surface treatments as independent variables.
deltaE* ranged from 0.7 to 1.7 in water, from 1.1 to 5.5 in cranberry juice, from 1.1 to 6.5 in black coffee, and from 1.5 to 3.9 in red wine. Statistically significant differences were observed (p < .05), with Fortify Plus showing increased staining (deltaE* > 3.3) and Jet Seal and Triad LC showing decreased staining (deltaE* < 2.0) in cranberry juice and coffee compared with staining of the unsealed specimens. Only Jet Seal provided resistance to staining in red wine.
Specimens without a surface sealer had statistically higher (p < .05) and perceptible or nearly perceptible color changes in cranberry juice, black coffee, and red wine than in water. Specimens coated with Jet Seal had statistically lower (p < .05) color changes than uncoated specimens in cranberry juice, black coffee, and red wine. When coated, the color changes of the stained specimens were not perceptible. Specimens coated with Triad LC had statistically lower (p < .05) color changes than unsealed specimens in cranberry juice and black coffee. When sealed, the color changes of the specimens stained with cranberry juice and black coffee were not perceptible. Both unsealed and sealed specimens stained with red wine were nearly perceptible. Specimens coated with Fortify Plus had statistically higher (p < .05) color changes than uncoated specimens in cranberry juice and black coffee but statistically the same (p < .05) color change as uncoated specimens in red wine. These specimens had perceptible color changes in cranberry juice, black coffee, and red wine.
Surface of methacrylate or dimethacrylate resins can improve resistance of a resin composite provisional material to staining caused by cranberry juice, black coffee, and red wine.
为保持临时材料的美观外观，抗染色性能是很有必要的。树脂封闭剂可能会提高抗染色性。
通过反射分光光度法测量树脂复合临时材料在三种染色溶液和水中储存后的颜色变化，以确定用三种甲基丙烯酸酯或聚氨酯二甲基丙烯酸酯树脂表面封闭剂处理以及未处理时的抗染色性。
树脂复合临时材料的样本接受三种树脂封闭剂之一（Fortify Plus，Bisco公司，伊利诺伊州绍姆堡；Jet Seal，Lang Dental制造公司，伊利诺伊州惠灵；Triad LC，登士柏国际公司，美国宾夕法尼亚州约克）或不进行表面封闭处理，然后在四种染色溶液之一（水[对照]、黑咖啡、蔓越莓汁、红酒）中储存72小时。在基线和储存后，使用反射分光光度计（Color-Eye 7000，麦克白部门，科尔摩根仪器公司，纽约州纽堡）通过CIE Lab测量颜色。计算颜色变化（ΔE），并通过双因素方差分析进行统计分析，将四种溶液和四种表面处理作为自变量。
在水中，ΔE范围为0.7至1.7；在蔓越莓汁中，为1.1至5.5；在黑咖啡中，为1.1至6.5；在红酒中，为1.5至3.9。观察到有统计学显著差异（p <.05），与未封闭样本的染色情况相比，Fortify Plus在蔓越莓汁和咖啡中的染色增加（ΔE* > 3.3），而Jet Seal和Triad LC的染色减少（ΔE < 2.0）。只有Jet Seal对红酒有抗染色性。
未进行表面封闭处理的样本在蔓越莓汁、黑咖啡和红酒中的颜色变化在统计学上高于（p <.05）水中的变化，且是可察觉的或接近可察觉的。在蔓越莓汁、黑咖啡和红酒中，涂有Jet Seal的样本的颜色变化在统计学上低于（p <.05）未涂覆的样本。涂覆后，染色样本的颜色变化不可察觉。在蔓越莓汁和黑咖啡中，涂有Triad LC的样本的颜色变化在统计学上低于未封闭的样本（p <.05）。密封后，用蔓越莓汁和黑咖啡染色的样本的颜色变化不可察觉。用红酒染色的未密封和密封样本的颜色变化都接近可察觉。在蔓越莓汁和黑咖啡中，涂有Fortify Plus的样本的颜色变化在统计学上高于未涂覆的样本（p <.05），但在红酒中与未涂覆的样本在统计学上颜色变化相同（p <.05）。这些样本在蔓越莓汁、黑咖啡和红酒中都有可察觉的颜色变化。
甲基丙烯酸酯或二甲基丙烯酸酯树脂表面可提高树脂复合临时材料对蔓越莓汁、黑咖啡和红酒引起的染色的抗性。
