Construction of bonding system by using total self-etching primer

为提高光固化复合树脂与抛光牙釉质和牙本质的粘接强度，研制了光固化复合树脂全自酸蚀底漆。以四种丙烯酸酯单体(2-丙烯酰氧乙基马来酸氢酯(2AEM)、2-丙烯氧乙基乙基柠檬酸氢酯(2AEC)、2-丙烯氧乙基乙基丁二酸氢酯(2AES)、2-丙烯氧乙基乙基磷酸氢酯(2AEP))为主要成分制备了二元自酸蚀底漆，并对其粘结效果进行了评价。与抛光牙釉质和牙本质相比，虽然含2AEM和2AEC的全自酸蚀底漆提高了粘结强度，但含有2AES和2AEP的全自酸蚀底漆不能提高粘结强度。然而，牙本质与牙本质的粘结强度用水冲洗10秒。然后将三种丙烯酸酯单体[甲基丙烯酸羟乙酯(HEMA)、甲基丙烯酰胺(MEMA)、N-羟甲基丙烯酰胺(MEAA)]作为三组分自酸蚀底漆中添加的主成分，加入2AEM或2AEC与水组成的三组分自酸蚀底漆，使粘结强度比采用二元体系得到的粘结强度提高更多。对于Scotchond多功能和PhotoBond，含有MEAA和二元体系的三组分全自酸蚀底漆显著提高了与牙本质的粘结强度。然而，添加MEA会降低牙釉质的粘结强度。对于Scotchond多功能，两种全自酸蚀底漆[(10wt%2AEM，40wt%MEAA和50wt%水)，(25wt%2AEM，25wt%MEAA和50wt%水)]即使涂抹时间减少，也不会降低处理效果。全自酸蚀底漆(10wt%2AEM、40wt%MEAA和50wt%水)虽然提高了Scotchond、PhotoBond和LBond的粘结强度，但对于MAC-Bond和FB Bond，处理效果较差。

The purpose of this study was to develop the total self-etching primer to improve the bond strength of light-cured composite resin to polished enamel and dentin.First four acrylate monomers {2-acryloyloxyethyl hydrogen maleate (2AEM), 2-acryloyloxyethylhydrogen citraconate (2AEC), 2-acryloyloxyethyl hydrogen succinate (2AES), 2-acryloyloxyethyl hydrogen phtarate (2AEP) } were prepared for principal ingredient of binary total self-etching primer to evaluate the effect on bonding. For Scotchbond Multipurpose and PhotoBond, although the total self-etching primer contained 2AEM and 2AEC improved the bond strengths compared to those to polished enamel and dentine, the total self-etching primer containing 2AES and 2AEP did not improve the bond strength. However, the bond strengths to dentine rinsed with water for 10 sec. after applying the total self-etching primer were lower than those to treated dentine.Then the three acrylate monomers {2-hydroxyethyl methacrylate (HEMA), N-methylol methacrylamide (MEMA), N-methylol acrylamide (MEAA) } were used as additional principle ingredient of three component total self-etching primer containing 2AEM or 2AEC and water to improve the bond strength more than those obtained by using binary systems. For Scotchbond Multipurpose and PhotoBond, the three component total self-etching primers contained MEAA and binary systems remarkably improved the bond strength to dentine. However, the bond strength to enamel decreased by adding MEAA.For Scotchbond Multipurpose, the two total self-etching primer { (10wt% 2AEM,40wt% MEAA and 50wt% water), (25wt% 2AEM,25wt% MEAA and 50wt% water) } did not decreased efficacy of treatment even if applying time reduced. Although for Scotchbond Multipurpose, photoBond and LB Bond, the total self-etching primer (10wt% 2AEM,40wt% MEAA and 50wt% water) improved the bond strength, for MAC-BOND and FB BOND,efficacy of treatment was low.