Department of Restorative Dentistry, School of Dentistry, Ege University, Bornova, Izmir, Turkey.
J Appl Oral Sci. 2012 Nov-Dec;20(6):636-42. doi: 10.1590/s1678-77572012000600008.
This study determined the effects of various surface treatment modalities on the bond strength of composite resins to glass-ionomer cements.
Conventional (Ketac Molar Quick Applicap) or resin-modified (Photac Fil Quick Aplicap) glass-ionomer cements were prepared. Two-step etch-rinse & bond adhesive (Adper Single Bond 2) or single-step self-etching adhesive (Adper Prompt L-Pop) was applied to the set cements. In the etch-rinse & bond group, the sample surfaces were pre-treated as follows: (1) no etching, (2) 15 s of etching with 35% phosphoric acid, (3) 30 s of etching, and (4) 60 s of etching. Following the placement of the composite resin (Filtek Z250), the bond strength was measured in a universal testing machine and the data obtained were analyzed with the two-way analysis of variance (ANOVA) followed by the Tukey's HSD post hoc analysis (p=0.05). Then, the fractured surfaces were examined by scanning electron microscopy.
The bond strength of the composite resin to the conventional glass-ionomer cement was significantly lower than that to the resin-modified glass-ionomer cement (p<0.001). No significant differences were determined between the self-etching and etch-rinse & bond adhesives at any etching time (p>0.05). However, a greater bond strength was obtained with 30 s of phosphoric acid application.
The resin-modified glass-ionomer cement improved the bond strength of the composite resin to the glass-ionomer cement. Both etch-rinse & bond and self-etching adhesives may be used effectively in the lamination of glass-ionomer cements. However, an etching time of at least 30 s appears to be optimal.
本研究旨在确定不同表面处理方式对复合树脂与玻璃离子水门汀粘结强度的影响。
制备常规（Ketac Molar Quick Applicap）或树脂改性（Photac Fil Quick Aplicap）玻璃离子水门汀。两步酸蚀-冲洗粘结剂（Adper Single Bond 2）或单步自酸蚀粘结剂（Adper Prompt L-Pop）应用于凝固的水门汀上。在酸蚀-冲洗粘结组中，样品表面进行如下预处理：（1）不酸蚀，（2）用 35%磷酸酸蚀 15s，（3）酸蚀 30s，（4）酸蚀 60s。在放置复合树脂（Filtek Z250）后，在万能试验机上测量粘结强度，并用双因素方差分析（ANOVA）对所得数据进行分析，然后用 Tukey 的 HSD 事后分析（p=0.05）。然后，用扫描电子显微镜观察断裂面。
复合树脂与常规玻璃离子水门汀的粘结强度明显低于与树脂改性玻璃离子水门汀的粘结强度（p<0.001）。在任何酸蚀时间下，自酸蚀和酸蚀-冲洗粘结剂之间均无显著差异（p>0.05）。然而，应用磷酸 30s 时获得的粘结强度更大。
树脂改性玻璃离子水门汀提高了复合树脂与玻璃离子水门汀的粘结强度。酸蚀-冲洗粘结剂和自酸蚀粘结剂均可有效地用于玻璃离子水门汀的层压。然而，酸蚀时间至少 30s 似乎是最佳的。
