Effect of a non-thermal, atmospheric-pressure, plasma brush on conversion of model self-etch adhesive formulations compared to conventional photo-polymerization.
Effect of a non-thermal, atmospheric-pressure, plasma brush on conversion of model self-etch adhesive formulations compared to conventional photo-polymerization.
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DOI：
10.1016/j.dental.2012.09.005
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发表时间：
2012-12
期刊：
影响因子：
5
通讯作者：
Wang, Yong
中科院分区：
文献类型：
--
作者：
Chen, Mingsheng;Zhang, Ying;Yao, Xiaomei;Li, Hao;Yu, Qingsong;Wang, Yong
确定非热大气等离子体诱导模型牙科自蚀刻粘合剂聚合的有效性和效率。所用单体混合物为双-[2-(甲基丙烯酰氧基)乙基]磷酸酯(2MP)和甲基丙烯酸2-羟乙酯(HEMA)，质量比为70/30、50/50和30/70。向上述配方中添加水：10-30 wt%。这些单体/水混合物在非热大气等离子刷下稳定处理 40 秒，工作温度为 32°C 至 35°C。为了进行比较，将光引发剂添加到上述配方中进行光聚合研究，并光固化 40 s。使用带有衰减全反射附件的 FTIR 光谱仪测量等离子体和光固化样品的转化度 (DC)。非热等离子刷可有效诱导模型自蚀刻粘合剂的聚合。水的存在不会对等离子固化样品的 DC 产生负面影响。事实上，随着粘合剂中水含量的增加，DC 值略有增加：当质量比为 50/50 (2MP/HEMA) 的粘合剂中水含量从 10% 增加到 30% 时，DC 值从 58.3% 增加到 68.7%。相同质量比和含水量下，等离子固化组的转化值高于光固化样品。等离子固化基团和光固化基团之间的光谱差异表明所得聚合物网络中存在细微的结构差异。这项研究首次证明非热等离子刷在临床环境下通过直接/间接能量转移诱导模型粘合剂聚合。该装置显示出聚合牙科复合材料修复体的前景，具有增强的特性和性能。
To determine the effectiveness and efficiency of non-thermal, atmospheric plasmas for inducing polymerization of model dental self-etch adhesives. The monomer mixtures used were bis-[2-(methacryloyloxy)ethyl] phosphate (2MP) and 2-hydroxyethyl methacrylate (HEMA), with mass ratios of 70/30, 50/50 and 30/70. Water was added to the above formulations: 10–30 wt%. These monomer/water mixtures were treated steadily for 40 s under a non-thermal atmospheric plasma brush working at temperatures from 32° to 35°C. For comparison, photo-initiators were added to the above formulations for photo-polymerization studies, which were light-cured for 40 s. The degree of conversion (DC) of both the plasma- and light-cured samples was measured using FTIR spectroscopy with an attenuated total reflectance attachment. The non-thermal plasma brush was effective in inducing polymerization of the model self-etch adhesives. The presence of water did not negatively affect the DC of plasma-cured samples. Indeed, DC values slightly increased, with increasing water content in adhesives: from 58.3% to 68.7% when the water content increased from 10% to 30% in the adhesives with a 50/50 (2MP/HEMA) mass ratio. Conversion values of the plasma-cured groups were higher than those of light-cured samples with the same mass ratio and water content. Spectral differences between the plasma- and light-cured groups indicate subtle structural distinctions in the resultant polymer networks. This research if the first to demonstrate that the non-thermal plasma brush induces polymerization of model adhesives under clinical settings by direct/indirect energy transfer. This device shows promise for polymerization of dental composite restorations having enhanced properties and performance.
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