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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Refractive indices of unfilled resin mixtures and cured composites related to color and translucency of conventional and low-shrinkage composites
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Refractive indices of unfilled resin mixtures and cured composites related to color and translucency of conventional and low-shrinkage composites

机译：与常规和低收缩复合材料的颜色和半透明相关的未填充树脂混合物和固化复合材料的折射率

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This study correlated the refractive indices (RIs) of unfilled resin mixtures and resin-based composites (RBCs) with color and translucency of conventional and low-shrinkage RBCs. Unfilled resin mixtures based on different ratios of conventional monomers Bisphenol A-glycidyl-methacrylate (BisGMA)/triethyleneglycol-dimethacrylate (TEGDMA) and urethane-dimethacrylate (UDMA)/TEGDMA and a low-shrinkage monomer FIT-852 (FIT, Esstech Inc.)/TEGDMA were used to prepare model RBCs, containing 30 wt % of the organic matrix and 70 wt % of silanated barium-glass fillers (n=1.553, Esstech Inc.). The RIs of resins were measured on an ABBE refractometer, those of cured RBCs using the Becke-line method in immersion oils. Color and translucency were determined using an AvaSpec-2048 (Avantes BV) spectrometer. The RIs of unfilled resin mixtures decreased with increasing amounts of TEGDMA. Cured RBCs had higher RIs than their respective resin mixtures. BisGMA-based composites were more translucent with significantly lower L* values than FIT- and UDMA-based RBCs. The RIs of unfilled resins positively correlated with cured RBCs (p=0.001), as did the RIs with translucency (p=0.001) and color (p=0.008). Resin mixtures and corresponding RBCs based on UDMA and its modified low-shrinkage version, FIT, showed similar optical properties. The RIs of unfilled resins appeared to be good predictors of the RIs of cured RBCs. (c) 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 7-13, 2017.
机译：该研究将未填充的树脂混合物和基于树脂基复合材料（RBC）的折射率（RIS）与常规和低收缩RBC的颜色和半透明相关联。基于常规单体双酚α-缩水甘油酯（Bisgma）/三乙二醇 - 二甲基丙烯酸酯（TEGDMA）和氨基甲酸酯 - 二甲基丙烯酸酯（UDMA）/ TEGDMA和低收缩单体FIT-852（FIT，ESSTECH INC.）的未填充的树脂混合物）/ TEGDMA用于制备型RBC，含有30wt％的有机基质和70wt％的硅烷钡 - 玻璃填料（n = 1.553，esttech Inc.）。在ABBE折射仪上测量树脂的RIS，使用BENKE-LINE方法在浸入油中的固化RBC。使用AvaSpec-2048（Avantes BV）光谱仪测定颜色和半透光。不填充的树脂混合物的RIS随着TEGDMA的增加而降低。固化的RBCs的RIS比其各自的树脂混合物更高。基于Bisgma的复合材料更明亮，L *值明显低于配合和基于UDMA的RBC。未填充树脂与固化的RBCs（p = 0.001）相关的RIS，如RIS的透明度（p = 0.001）和颜色（p = 0.008）。基于UDMA的树脂混合物和相应的RBCS及其改性的低收缩版，适合，显示出类似的光学性质。未填充的树脂的RIS似乎是固化的RBC的ris的良好预测因子。 （c）2015 Wiley期刊，Inc。J生物保解率B部分B：Appl Biomater，105B：7-13,2017。

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