Electrical properties of resin monomers used in restorative dentistry.
Electrical properties of resin monomers used in restorative dentistry.
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DOI：
10.1016/j.dental.2012.05.009
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发表时间：
2012-09
期刊：
影响因子：
5
通讯作者：
Breschi, Lorenzo
中科院分区：
文献类型：
--
作者：
Breschi, Marco;Fabiani, Davide;Sandrolini, Leonardo;Colonna, Martino;Sisti, Laura;Vannini, Micaela;Mazzoni, Annalisa;Ruggeri, Alessandra;Pashley, David H.;Breschi, Lorenzo
电场的应用已被证明在混合层形成期间对目前用于牙本质粘结系统的树脂单体的浸渍产生积极影响。本研究提出了一个实验表征这些单体的电性能，其目的是将它们与它们的化学结构相关联，并寻求深入了解在外加电场下单体迁移的机制。所检查的一些常见单体是TEGDMA（三甘醇二甲基丙烯酸酯）、HEMA（甲基丙烯酸2-羟乙酯）、UDMA（氨基甲酸酯二甲基丙烯酸酯）、2-MP（双[2-（甲基丙烯酰氧基）乙基]磷酸酯、5-（2，5-二氧代四氢糠基）-3-甲基-3-环己烯基-1，2-二羧酸酐的TCDM二（甲基丙烯酸羟乙酯）酯）和Bis-GMA [2，2-双（4-2-羟基-3-甲基丙烯酰氧基丙氧基苯基）丙烷]。制造用于测量单体电性能的定制电池，并测量树脂单体的电导率和介电常数。测试单体的介电常数受电频率的影响很大。随着频率降低，观察到的介电常数和介电损耗的大值表明离子极化的主导效应，在显示最高电导率的材料中特别明显。测试单体的介电常数和电导率显示出类似的行为，即具有最低介电常数的材料也显示出小的电导率值，反之亦然。本研究的结果揭示了良好的相关性之间的电性能和霍伊溶解度参数，特别是，较高的极性贡献（极性力加氢键）较高的介电常数和电导率。这项研究的最相关的结果是，电泳机制占主导地位的电内渗效应，在确定的单体迁移下的应用程序的电场。
The application of an electric field has been shown to positively influence the impregnation of the resin monomers currently used in dentin bonding systems during hybrid layer formation. This study presents an experimental characterization of the electrical properties of these monomers with the aim of both correlating them to their chemical structures and seeking an insight into the mechanisms of the monomer migration under an applied electric field. Some common monomers examined were TEGDMA (triethyleneglycol dimethacrylate), HEMA (2-hydroxyethyl methacrylate), UDMA (urethane dimethacrylate), 2-MP (bis[2-(methacryloyloxy)ethyl] phosphate, TCDM di(hydroxyethyl methacrylate) ester of 5-(2,5-dioxotetrahydrofurfuryl)-3-methyl-3-cyclohexenyl-1,2-dicarboxylic anhydride) and Bis-GMA [2,2-bis(4-2-hydroxy-3-methacryloyloxypropoxyphenyl)propane]. A customized cell produced for the measurement of the electrical properties of monomers was manufactured and electrical conductivity and permittivity of resin monomers were measured. The permittivity of the tested monomers is largely affected by electrical frequency. The large values of permittivity and dielectric losses observed as frequency decreased, indicate a dominant effect of ionic polarization, particularly evident in materials showing the highest conductivity. Permittivity and conductivity of the tested monomers showed a similar behavior, i.e. materials with the lowest permittivity also show small values of conductivity and vice versa. The results of the present study revealed a good correlation between electrical properties and Hoy solubility parameters and, in particular, the higher the polar contribution (polar forces plus hydrogen bonding) the higher the permittivity and conductivity. The most relevant outcome of this study is that the electrophoretic mechanism prevails on the electroendoosmotic effect in determining the monomer migration under the application of electric fields.
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影响因子：
2.2
作者：
HIERHOLZER, JC
通讯作者：
HIERHOLZER, JC
影响因子：
7.6
作者：
Tay, FR;Pashley, DH;Yoshiyama, M
通讯作者：
Yoshiyama, M
影响因子：
5
作者：
Colonna, Martino;Breschi, Marco;Breschi, Lorenzo
通讯作者：
Breschi, Lorenzo
影响因子：
7.6
作者：
Liu Y;Tjäderhane L;Breschi L;Mazzoni A;Li N;Mao J;Pashley DH;Tay FR
通讯作者：
Tay FR
影响因子：
7.6
作者：
Breschi, L.;Mazzoni, A.;Tay, F. R.
通讯作者：
Tay, F. R.