Arregui Maria, Giner Luis, Ferrari Marco, Vallés Marta, Mercadé Montserrat
Universitat Internacional de Catalunya, Department of Restorative Dentistry and Endodontics, Barcelona, Spain.
University of Siena, Policlinico Le Scotte, Department of Medical Biotechnologies, Siena, Italia.
Braz Oral Res. 2016 Nov 28;30(1):e123. doi: 10.1590/1807-3107BOR-2016.vol30.0123.
Color match and water sorption are two factors that affect restorative materials. Discoloration is essential in the lifespan of restorations. The aim of this study was to evaluate color change and water sorption of nine flowable composites at multiple time points over 6 months. 60 samples of each composite were divided into two groups (Color Change and Water Sorption/Solubility). Each Color Change group was divided into six subgroups, which were immersed in distilled water (DW), coffee (CF), Coca-Cola (CC), red wine (RW), tea (TE) and orange juice (OJ). The color was measured at the baseline, 1, 2, 3 and 4 weeks, and 3 and 6 months and color change values (ΔE) were calculated. Each Water Sorption [WS]/Solubility [WL] group was tested according to ISO 4049:2009. The data were evaluated using two-way ANOVA, Fisher's post-hoc test and Pearson's correlation test. The composite with the lowest ΔE differed for each solution: Filtek™ Bulk Fill in DW (∆E = 0.73 (0.17-1.759)); Vertise Flow in CF (∆E = 14.75 (7.91-27.41)), in TE (∆E = 7.27 (2.81-24.81)) and OJ (∆E = 3.17 (0.87-9.92)); Tetric EvoFlow® in CC (∆E = 1.27 (0.45-4.02)); and Filtek™ Supreme XTE in RW (∆E = 8.88 (5.23-19.59)). RW caused the most discoloration (∆E = 23.62 (4.93-51.36)). Vertise Flow showed the highest water sorption (WS = 69.10 ± 7.19). The Pearson test showed statistically significant positive correlations between water sorption and solubility and between water sorption and ∆E; the positive solubility-∆E correlation was not statistically significant. The findings suggest that water sorption is one factor associated with the ability of composites to discolor; however, discoloration is a multifactorial problem.
颜色匹配和吸水性是影响修复材料的两个因素。变色在修复体的使用寿命中至关重要。本研究的目的是评估9种可流动复合树脂在6个月内多个时间点的颜色变化和吸水性。每种复合树脂制备60个样本，分为两组（颜色变化组和吸水性/溶解性组）。每个颜色变化组再分为6个亚组，分别浸泡在蒸馏水（DW）、咖啡（CF）、可口可乐（CC）、红酒（RW）、茶（TE）和橙汁（OJ）中。在基线、第1、2、3和4周以及第3和6个月测量颜色，并计算颜色变化值（ΔE）。每个吸水性[WS]/溶解性[WL]组根据ISO 4049:2009进行测试。数据采用双向方差分析、Fisher事后检验和Pearson相关性检验进行评估。每种溶液中ΔE最低的复合树脂各不相同：在蒸馏水中为Filtek™ Bulk Fill（∆E = 0.73(0.17 - 1.759)）；在咖啡中为Vertise Flow（∆E = 14.75(7.91 - 27.41)），在茶中（∆E = 7.27(2.81 - 24.81)）和橙汁中（∆E = 3.17(0.87 - 9.92)）；在可口可乐中为Tetric EvoFlow®（∆E = 1.27(0.45 - 4.02)）；在红酒中为Filtek™ Supreme XTE（∆E = 8.88(5.23 - 19.59)）。红酒导致的变色最多（∆E = 23.62(4.93 - 51.36)）。Vertise Flow显示出最高的吸水性（WS = 69.10 ± 7.19）。Pearson检验显示吸水性与溶解性之间以及吸水性与ΔE之间存在统计学上显著的正相关；溶解性与ΔE之间的正相关无统计学意义。研究结果表明，吸水性是与复合树脂变色能力相关的一个因素；然而，变色是一个多因素问题。
