Construction of bonding system by using total self-etching primer

为了提高光固化复合树脂与抛光牙釉质和牙本质的结合强度，研究了光固化复合树脂的全自蚀底漆。首先制备了4种丙烯酸单体：2-丙烯酰氧乙基马来酸氢酯（2AEM）、2-丙烯酰氧乙基柠檬酸氢酯（2AEC）、2-丙烯酰氧乙基琥珀酸氢酯（2AES）、2-丙烯酰氧乙基邻苯二甲酸氢酯（2AEP）}，作为二元全自蚀刻底漆的主成分，考察其对键合的影响。对于Scotchbond Multipurpose和PhotoBond，虽然含有2AEM和2AEC的总自蚀刻处理剂比抛光牙釉质和牙本质的处理剂提高了结合强度，但含有2AES和2AEP的总自蚀刻处理剂没有提高结合强度。然而，应用全自蚀刻底漆10秒后，与牙本质的结合强度低于处理过的牙本质。然后将3种丙烯酸单体{2-甲基丙烯酸羟乙基酯（HEMA）、n -甲基丙烯酰胺（MEMA）、n -甲基丙烯酰胺（MEAA）}作为添加主成分，制备含2AEM或2AEC和水的三组分总自蚀刻底漆，比二元体系得到的底漆的结合强度提高得更多。对于Scotchbond Multipurpose和PhotoBond，含有MEAA和二元体系的三组分全自蚀刻底漆显著提高了与牙本质的结合强度。MEAA的加入降低了其与牙釉质的结合强度。对于Scotchbond Multipurpose，两种总自蚀刻底漆{（10wt% 2AEM，40wt% MEAA和50wt%水），（25wt% 2AEM，25wt% MEAA和50wt%水）}即使使用时间缩短，也不会降低处理效果。虽然对于Scotchbond Multipurpose， photoBond和LB Bond，总自蚀蚀底漆（10wt% 2AEM，40wt% MEAA和50wt%水）提高了粘结强度，但对于MAC-BOND和FB Bond，处理效果较低。

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.