聚多巴胺对氧化锆粘接强度的影响及老化后的变化

Effect of polydopamine on bonding strength of zirconia and study on aging test

目的探究聚多巴胺(polydopamine,PDA)复合涂层处理对氧化锆与自粘接树脂水门汀3M ESPE Rely XTMU200的粘接强度的影响及老化试验后粘接强度的变化。方法将“喷砂”、“喷砂+硅烷化”和“喷砂+PDA复合涂层”表面处理后的氧化锆试件经3M U200与树脂块进行粘接。然后随机分为3组,进行即刻剪切粘接强度的测试和冷热循环老化及PH循环老化后剪切粘接强度的测试。对各组粘接强度进行统计学分析。结果“喷砂+硅烷化”组的氧化锆与树脂之间的粘接强度最大,差异有统计学意义(P<0.05);“喷砂+PDA复合涂层”组的粘接强度值略大于“喷砂”组,但差异无统计学意义(P>0.05)。老化试验后,各表面处理组的粘接强度均发生明显下降(P<0.05);“喷砂+PDA复合涂层”组粘接强度下降率最大,差异有统计学意义(P<0.05),“喷砂+硅烷化”组粘接强度下降率稍高于“喷砂”组,但差异无统计学意义(P>0.05)。结论PDA复合涂层未能有效增加氧化锆与树脂粘接剂的粘接强度,其粘接强度和老化试验后的粘接稳定性均小于硅烷化涂层。

Objective To explore the effect of Polydopamine(PDA)compound coating on the bonding strength of zirconia and self-bonding resin cement 3M ESPE Rely XTM U200 and the change of bonding strength after aging test.Methods Zirconia specimens were treated with three different surface treatments:"sandblasting,""sandblasting+silanization,"and"sandblasting+PDA composite coating."These treated zirconia specimens were then bonded to resin blocks using 3M U200.The samples were divided into three groups for immediate shear bond strength testing,thermocycling aging,and pH cycling aging followed by shear bond strength testing.Statistical analysis was performed on the bonding strength data of each group.Results The"sandblasting+silanization"group showed the highest bonding strength between zirconia and resin,with statistically significant differences(P<0.05).The"sandblasting+PDA composite coating"group had slightly higher bonding strength than the"sandblasting"group,but the difference was not statistically significant(P>0.05).After aging tests,all surface treatment groups experienced a significant reduction in bonding strength(P<0.05).The"sandblasting+PDA composite coating"group exhibited the greatest decrease in bonding strength,which was statistically significant(P<0.05).The decrease in bonding strength for the"sandblasting+silanization"group was slightly higher than that of the"sandblasting"group,but the difference was not statistically significant(P>0.05).Conclusion The PDA composite coating did not effectively enhance the bonding strength between zirconia and resin cement.Its bonding strength and stability after aging were inferior to those of the silanization coating.