Sedrez-Porto José Augusto, Münchow Eliseu Aldrighi, Cenci Maximiliano Sérgio, Pereira-Cenci Tatiana
Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil.
Universidade Federal de Juiz de Fora - UFJF, Health Science Institute, Department of Dentistry, Governador Valadares, MG, Brazil.
Braz Oral Res. 2017 Jul 3;31:e54. doi: 10.1590/1807-3107BOR-2017.vol31.0054.
The aim of this study is to evaluate the influence of modeling liquids on the translucency and color shade of resin composites (RCs) after one year of storage. RC specimens were prepared using either a conventional insertion technique (control; without modeling liquid) or a restorative dental modeling insertion technique (RDMIT) with dental adhesives as modeling liquids (Scotchbond™ Multi-Purpose [SBMP; 3M ESPE] or Adper™ Single Bond 2 [SB; 3M ESPE]). The initial colors of the specimens were obtained with a digital spectrophotometer and the CIELab* color system, after which specimens were stored (37°C) in distilled water or red wine for 12 months. Color measurements were reassessed after 6 and 12 months of storage, and scanning electron microscopy was performed after 12 months. Translucency and color change (ΔE*) were calculated and analyzed using ANOVA and Tukey's test (α = 5%). RC samples prepared via RDMIT showed a translucency similar to that of control samples. ΔE* was also less intense for RCs containing SBMP than for RCs containing SB. Specimens stored in wine showed a clear pattern of degradation, especially in the control group, and surface degradation seemed to be less intense for specimens prepared with SBMP and SB than for specimens without. Specimens stored in water did not show clear evidence of surface degradation. RDMIT appears to be an interesting approach to reduce ΔE* in RCs over time without negative effects on the translucency of the material. However, the modeling liquid should feature a hydrophobic composition, similar to that used in the SBMP group, the achieve the best results.
本研究的目的是评估造型液体对树脂复合材料（RCs）储存一年后的透明度和颜色深浅的影响。RC标本采用传统插入技术（对照；不使用造型液体）或修复牙科造型插入技术（RDMIT）制备，使用牙科粘合剂作为造型液体（Scotchbond™多功能粘合剂[SBMP；3M ESPE]或Adper™单键2[SB；3M ESPE]）。用数字分光光度计和CIELab颜色系统获取标本的初始颜色，然后将标本在蒸馏水或红酒中（37°C）储存12个月。在储存6个月和12个月后重新评估颜色测量值，并在12个月后进行扫描电子显微镜检查。使用方差分析和Tukey检验（α = 5%）计算和分析透明度和颜色变化（ΔE）。通过RDMIT制备的RC样品显示出与对照样品相似的透明度。含有SBMP的RCs的ΔE也比含有SB的RCs弱。储存在葡萄酒中的标本显示出明显的降解模式，尤其是在对照组中，并且用SBMP和SB制备的标本的表面降解似乎比没有使用的标本弱。储存在水中的标本没有显示出明显的表面降解迹象。随着时间推移RDMIT似乎是一种减少RCs中ΔE的有趣方法，且对材料的透明度没有负面影响。然而，造型液体应具有疏水性成分，类似于SBMP组中使用的成分，以获得最佳效果。
