甲基丙烯酰氧乙基磷酸胆碱对自酸蚀粘接剂托槽剪切粘接强度的影响

Effect of MPC on the shear bond strength of self-etching adhesive

目的评价甲基丙烯酰氧乙基磷酸胆碱(MPC)对自酸蚀粘接剂托槽粘接强度的影响,为研发具有抗蛋白附着性能的自酸蚀粘接剂奠定基础。方法将MPC按照质量分数0%、3%、5%、7.5%和10%的比例添加到商品化的自酸蚀粘接剂(3M,Adper Easy One)中制作改性自酸蚀粘接剂。收集因正畸减数拔除的健康前磨牙180颗,分为6组,每组30颗。实验组用MPC改性自酸蚀粘接剂酸蚀,标记为A_0,A_3,A_5,A_(7.5),A_(10),对照组用37%磷酸酸蚀。将上述各组分别用树脂改良型玻璃离子粘接剂粘接托槽,分别测试即刻、模拟口腔环境30天和180天后的托槽粘接强度。结果实验组A_0,A_3,A_5,A_(7.5),A_(10)与对照组即刻、模拟口腔环境30天和180天后的粘接强度相比均无统计学差异(P>0.05)。实验组A_(10)在3个时间点的粘接强度为(5.20±0.9)MPa,(4.62±0.7)MPa和(4.19±0.7)MPa)低于临床使用标准,与对照组以及其他实验组的粘接强度相比显著下降(P<0.0001)。结论将3%~7.5%MPC添加到商品化自酸蚀粘接剂中不影响托槽粘接强度,且长期稳定性良好,为进一步研发具有抗蛋白附着性能的自酸蚀粘接剂奠定基础。

Objective To evaluate the effect of 2-methacryloyloxyethyl phosphorylcholine（ MPC） on the shear bond strength of self-etching adhesive. Methods MPC was incorporated into 3 M Adper Easy One（ AEO） at 0%,3%,5%,7. 5% and 10% by mass. 37% phosphoric acid was used as a control group. Enamel shear bond strength（ SBS） was determined. Results The SBS values at three different time points were not reduced at 0%,3%,5%,7. 5% MPC,but was significantly decreased at 10% MPC,compared with the control group（ P 〉 0. 05）. The differences among the other 5 groups were not statistically significant（ P 〈 0. 0001）. Conclusion 3%,5% and 7. 5% MPC can meet the standard adhesive bonding strength and display good long-term stability.