不同表面处理对氧化锆陶瓷-树脂水门汀粘接强度与密合性的影响

Effects of different surface treatments on the bonding strength and tightness of zirconia-resin cement interface

目的探索不同表面处理方法对氧化锆-树脂水门汀粘接强度及密合性的影响。方法氧化锆陶瓷圆片根据表面处理方式分为3组,即无表面处理组、喷砂组及喷砂+偶联剂组(每组n=10),分别制作氧化锆-树脂水门汀微剪切粘接试件。万能试验机测试粘接强度并统计断裂模式,扫描电子显微镜观察粘接界面密合性。结果无表面处理组粘接强度最低〔(4.4±2.1)MPa〕,断裂模式中粘接破坏占92%。喷砂组粘接强度较无表面处理组明显提高〔(18.2±4.5)MPa〕,断裂模式中内聚破坏比例为54%。喷砂+偶联剂组粘接强度最高〔(31.0±4.7)MPa〕,断裂模式中内聚破坏占71%。扫描电子显微镜观察粘接界面发现喷砂组中氧化锆与树脂水门汀之间存在大量裂隙,总长度达(2787±464)μm。无表面处理组及喷砂+偶联剂组粘接界面裂隙长度较喷砂组显著减小。结论氧化铝喷砂联合应用偶联剂能够显著提高氧化锆与树脂水门汀之间的粘接强度及粘接界面密合性。

Objective To explore the effects of different surface treatments on the bonding strength and tightness of zirconia-resin cement interface.Methods The zirconia ceramic discs were divided into three groups according to the surface treatment Methods The zirconia ceramic discs were divided into three groups according to the surface treatment methods:no surface treatment group,sandblasting group and sandblasting+primer(z-prime Plus)group,and the zirconia-resin cement micro-shear bonding specimens were made respectively.The bonding strength was tested by universal testing machine and the fracture mode was calculated.Scanning electron microscopy(SEM)was used to observe the bonding interface tightness.Results Bonding strength was lowest in the no surface treatment group[(4.4±2.1)MPa],and adhesion failure accounted for 92% in the fracture mode.Compared with no surface treatment group,the bonding strength of sandblasting group was significantly increased[(18.2±4.5)MPa],and the cohesive failure rate in the fracture mode was 54%.The bonding strength was highest in sandblasting+primer group[(31.0±4.7)MPa],and the cohesive failure accounted for 71%in the fracture mode.Scanning electron microscopy of the bonding interface showed that there were many cracks between zirconia and resin cement in the sandblasting group.The length of interfacial cracks in the no surface treatment group and sandblasting+primer group was significantly reduced compared with that in the sandblasting group.Conclusions The combination of alumina sandblasting with primer coating can significantly improve the bonding strength and interface tightness between zirconia and resin cement.