Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich, Goethestr. 70, 80336 Munich, Germany; Walther-Straub-Institute of Pharmacology and Toxicology, Nussbaumstr. 26, 80336 Munich, Germany.
KU Leuven Biomat, Department of Oral Health Sciences, KU Leuven, Kapucijnenvoer 7, B-3000 Leuven, Belgium.
Dent Mater. 2016 Feb;32(2):127-35. doi: 10.1016/j.dental.2015.11.033. Epub 2015 Dec 21.
Bleaching treatments can affect release of components from conventional composites. In this continuing study the influence of two different bleaching gels on the elution of bulk-fill composite components was investigated.
The composites Tetric EvoCeram(®) Bulk Fill, QuiXFil™ and X-tra fil were treated with the bleaching gels Opalescence PF 15% (PF 15%) for 5 h and PF 35% (PF 35%) for 30 min and then stored in methanol and water for 24 h and 7 d. The eluates were analyzed by gas chromatography/mass spectrometry (GC/MS). Unbleached specimens were used as control group.
A total of 7 different elutable substances have been identified from the investigated composites after bleaching-treatment. Three of them were methacrylates: 2-hydroxyethyl methacrylate (HEMA), triethylene glycol dimethacrylate (TEGDMA) and trimethylolpropane trimethacrylate (TMPTMA). Compared to the unbleached controls an increase in elution after PF 15%-treatment of following compounds was found: HEMA (Tetric EvoCeram(®) Bulk Fill), TEGDMA (QuiXFil™, X-tra fil) and 4-N,N-dimethylaminobenzoic acid butyl ethoxy ester (DMABEE) (Tetric EvoCeram(®) Bulk Fill, QuiXFil™, X-tra fil). Following compounds showed a reduction in elution after PF 35%-treatment compared to controls: TEGDMA (QuiXFil™) and DMABEE (Tetric EvoCeram(®) Bulk Fill). The highest concentration of HEMA was 0.22 mmol/l (Tetric EvoCeram(®) Bulk Fill, methanol, 7 d, PF 15%), the highest concentration of TEGDMA was 0.3 mmol/l (X-tra fil, water, 7 d, PF 15%) and the highest concentration of DMABEE was 0.05 mmol/l (QuiXFil™, water, 7 d, PF 35%).
PF 15% and PF 35% can lead to reduced and/or increased elution of some bulk-fill components, compared to unbleached bulk-fill composites.
漂白处理会影响传统复合材料中成分的释放。在这项持续研究中，研究了两种不同的漂白凝胶对块状充填复合材料成分洗脱的影响。
用漂白凝胶 Opalescence PF 15%（PF 15%）处理 Tetric EvoCeram（®）块状充填、QuiXFil（™）和 X-tra fil 复合材料 5 小时，用 PF 35%（PF 35%）处理 30 分钟，然后在甲醇和水中储存 24 小时和 7 天。用气相色谱/质谱（GC/MS）分析洗脱液。未漂白的标本用作对照组。
经漂白处理后，从研究的复合材料中鉴定出 7 种不同的可洗脱物质。其中 3 种为甲基丙烯酸酯：2-羟乙基甲基丙烯酸酯（HEMA）、三乙二醇二甲基丙烯酸酯（TEGDMA）和三羟甲基丙烷三甲基丙烯酸酯（TMPTMA）。与未漂白的对照组相比，PF 15%处理后以下化合物的洗脱量增加：HEMA（Tetric EvoCeram（®）块状充填）、TEGDMA（QuiXFil（™）、X-tra fil）和 4-N，N-二甲基氨基苯甲酸丁氧基乙酯（DMABEE）（Tetric EvoCeram（®）块状充填、QuiXFil（™）、X-tra fil）。与对照组相比，PF 35%处理后以下化合物的洗脱量减少：TEGDMA（QuiXFil（™））和 DMABEE（Tetric EvoCeram（®）块状充填）。HEMA 的最高浓度为 0.22mmol/l（Tetric EvoCeram（®）块状充填，甲醇，7 天，PF 15%），TEGDMA 的最高浓度为 0.3mmol/l（X-tra fil，水，7 天，PF 15%），DMABEE 的最高浓度为 0.05mmol/l（QuiXFil（™），水，7 天，PF 35%）。
与未漂白的块状充填复合材料相比，PF 15%和 PF 35%可导致一些块状充填成分的洗脱减少和/或增加。
