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首页> 外文期刊>International Journal of Molecular Sciences >Degree of Conversion and BisGMA, TEGDMA, UDMA Elution from Flowable Bulk Fill Composites
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Degree of Conversion and BisGMA, TEGDMA, UDMA Elution from Flowable Bulk Fill Composites

机译：可流动的散装填充复合材料的转化度和BisGMA，TEGDMA，UDMA洗脱

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The degree of conversion (DC) and the released bisphenol A diglycidyl ether dimethacrylate (BisGMA), triethylene glycol dimethacrylate (TEGDMA) and urethane dimethacrylate (UDMA) monomers of bulk-fill composites compared to that of conventional flowable ones were assessed using micro-Raman spectroscopy and high performance liquid chromatography (HPLC). Four millimeter-thick samples were prepared from SureFil SDR Flow (SDR), X-tra Base (XB), Filtek Bulk Fill (FBF) and two and four millimeter samples from Filtek Ultimate Flow (FUF). They were measured with micro-Raman spectroscopy to determine the DC% of the top and the bottom surfaces. The amount of released monomers in 75% ethanol extraction media was measured with HPLC. The differences between the top and bottom DC% were significant for each material. The mean DC values were in the following order for the bottom surfaces: SDR_4mm_20s > FUF_2mm_20s > XB_4mm_20s > FBF_4mm_20s > XB_4mm_10s > FBF_4mm_10s > FUF_4mm_20s. The highest rate in the amount of released BisGMA and TEGDMA was found from the 4 mm-thick conventional flowable FUF. Among bulk-fills, FBF showed a twenty times higher amount of eluted UDMA and twice more BisGMA; meanwhile, SDR released a significantly higher amount of TEGDMA. SDR bulk-fill showed significantly higher DC%; meanwhile XB, FBF did not reach the same level DC, as that of the 2 mm-thick conventional composite at the bottom surface. Conventional flowable composites showed a higher rate of monomer elution compared to the bulk-fills, except FBF, which showed a high amount of UDMA release.
机译：使用微拉曼评估了散装填充复合材料的转化率（DC）和释放的双酚A二缩水甘油醚二甲基丙烯酸酯（BisGMA），三乙二醇二甲基丙烯酸酯（TEGDMA）和尿烷二甲基丙烯酸酯（UDMA）单体与常规可流动复合材料的比较光谱和高效液相色谱（HPLC）。从SureFil SDR Flow（SDR），X-tra Base（XB），Filtek Bulk Fill（FBF）制备了四个毫米厚的样品，从Filtek Ultimate Flow（FUF）制备了两个和四个毫米的样品。用微拉曼光谱法测量它们，以确定顶部和底部表面的DC％。用HPLC测量75％乙醇提取介质中单体的释放量。每种材料的最高DC％和最低DC％之间的差异都很大。底部表面的平均DC值按以下顺序排列：SDR_4mm_20s> FUF_2mm_20s> XB_4mm_20s> FBF_4mm_20s> XB_4mm_10s> FBF_4mm_10s> FUF_4mm_20s。从4毫米厚的常规可流动FUF中发现BisGMA和TEGDMA的释放量最高。在散装填料中，BFF的洗脱UDMA量高出二十倍，而BisGMA则高出两倍。同时，SDR释放了大量的TEGDMA。 SDR批量填充显示出明显更高的DC％;同时，XB的FBF达不到底面上2 mm厚的常规复合材料的DC水平。常规的可流动复合材料与散装填充料相比，单体洗脱速率更高，但FBF除外，后者显示出大量的UDMA释放。

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