Development of light-cured bonding a gent which bond to polished dentin

本课题组研制了一种新型的光固化粘接体系，该体系采用马来酸氢2-丙烯酰氧乙酯（2AEC）或柠康酸氢2-丙烯酰氧乙酯（2AEC）与N-羟甲基丙烯酰胺（MEAA）组成的自酸蚀底漆，使市场上的光固化粘接体系具有较高的粘接强度。根据这些结果，我认为有可能开发出与粘合剂单体混合的新型光固化粘合剂（2-甲基丙烯酰氧基乙基马来酸氢酯：2 MEM，和2-甲基丙烯酰氧基乙基琥珀酸氢酯：2 MES）和自酸蚀底漆，通过添加2 MEM制备了60种光固化粘结剂（1、5、10重量%）或2 MES（1、5重量%）或BisGMA（1重量%）与含有水、2AEM或2AEC和MEAA或HEMA的各种自蚀刻底漆的粘合强度为约3 MPa至约16 MPa。特别是，含有2AEM或2AEC、MEAA和2 MEM的光固化粘结剂的粘结强度显示出高于其他光固化粘结剂。（1个月、3个月、6个月）没有降低光固化粘合剂的粘合强度，其在24小时水浸后显示出高粘合强度，从4 ℃到60 ℃的十万次热循环降低了结合强度。

I had developed the new bonding system with the self-etching primer containing 2-acryloyloxyethyl hydrogen maleate (2AEC) or 2-acryloyloxyethyl hydrogen citraconate (2AEC), and N-methylolacrylamide (MEAA), It produced high bond strength of light-cured bonding system on the market. From these results, I thought it was possible to develop the new light-cured bonding agent which was mixed with adhesive monomers (2-methacryloyloxyethyl hydrogen maleate : 2MEM, and 2-methacryloyloxyethyl hydrogen succinate : 2MES) and self-etching primer.The sixty light-cured bonding agents were prepared by adding 2MEM(1, 5,10 wt %) or 2MES (1, 5 wt %) or BisGMA (1 wt %) to various self-etching primers containing water, 2AEM or 2AEC, and MEAA or HEMA.The bond strength of the new light-cured bonding agents were ranged from about 3 MPa to about 16 MPa. Especially, the bond strength of light-cured bonding agents containing 2AEM or 2AEC, MEAA, and 2MEM showed higher than other light-cured bonding agents.Although, the long term water immersion (1 month, 3 months, 6 months) did not reduce the bond strength of light-cured bonding agents which showed high bond strength after 24 hours water immersion, a hundred thousand therma cycling from 4ﾟC to 60ﾟC reduced the bond strength.