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首页> 外文期刊>Acta biomaterialia >Sesamin as a co-initiator for unfilled dental restorations.
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Sesamin as a co-initiator for unfilled dental restorations.

机译：芝麻素作为未填充牙齿修复物的共引发剂。

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A natural component, sesamin (SA), was used to replace conventional amine as co-initiator for dental composite. A combination of camphorquinone (CQ) and SA was employed to initiate the photopolymerization of 2-2-bis[4-(2-hydroxy-3-methacryloxyprop-1-oxy)phenyl] propane/triethylene glycol dimethacrylate (70/30wt.%). The kinetics was recorded by real-time Fourier transform infrared spectroscopy. The mechanical properties were measured by dynamic mechanical analysis, the cell toxicity was investigated by MTT assay and a mixture of CQ and ethyl 4-N,N-dimethylaminobenzoate (EDMAB) was used as control in the same photocuring condition. The results indicated that the addition of SA as co-initiator greatly improved the rate of polymerization and final double-bond conversion (DC) when compared with the system initiated by CQ alone. Compared with EDMAB, the final DC of the CQ/SA system (71%) was slightly lower than that of CQ/EDMAB (76%); SA resulted in approximately the same storage modulus at around 37 degrees C, but a slightly higher glass transition temperature. SA produced lower yellowing effect and good in vitro biocompatibility. The water sorption and solubility for two mixtures were very close and within the range of the ISO 4049 specification. These results suggest that SA is an effective alternative co-initiator to conventional amine. The natural compound characteristics of SA make it more promising than amine in dental resin formulations.
机译：使用天然成分芝麻素（SA）代替常规的胺作为牙科复合材料的共引发剂。樟脑醌（CQ）和SA的组合用于引发2-2-双[4-（2-（3-羟基-3-甲基丙烯酰氧基丙-1-氧基）苯基]丙烷/三乙二醇二甲基丙烯酸酯的光聚合（70 / 30wt。％ ）。通过实时傅立叶变换红外光谱法记录动力学。通过动态力学分析测量机械性能，通过MTT分析研究细胞毒性，并且在相同的光固化条件下，将CQ和4-N，N-二甲基氨基苯甲酸乙酯（EDMAB）的混合物用作对照。结果表明，与仅由CQ引发的体系相比，添加SA作为共引发剂可大大提高聚合速率和最终双键转化（DC）。与EDMAB相比，CQ / SA系统的最终DC（71％）略低于CQ / EDMAB（76％）; SA在约37摄氏度时产生了几乎相同的储能模量，但玻璃化转变温度略高。 SA产生较低的泛黄效果和良好的体外生物相容性。两种混合物的吸水率和溶解度非常接近，并且在ISO 4049规范范围内。这些结果表明，SA是常规胺的有效替代共引发剂。 SA的天然化合物特性使其在牙科树脂配方中比胺更具前景。

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