Effects of etching and adhesive applications on the bond strength between composite resin and glass-ionomer cements

• Published in: Journal of applied oral science 2012-12, Vol.20 (6), p.636-642
• Main Authors: Pamir, Tijen, Sen, Bilge Hakan, Evcin, Ozgür
• Format: Article
• Language: English
• Subjects: Acid etching; Acid Etching, Dental - methods; Composite resins; Composite Resins - chemistry; Dental adhesives; Dental Bonding - methods; Dental Cements - chemistry; Dental Restoration Failure; Dentistry; DENTISTRY, ORAL SURGERY & MEDICINE; Glass Ionomer Cements - chemistry; Glass-ionomer cements; Materials Testing; Microscopy, Electron, Scanning; Original; Phosphoric Acids - chemistry; Shear Strength; Surface Properties; Time Factors
• ISSN: 1678-7757; 1678-7765; 1678-7765; 1678-7757
• 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 (p0.05). 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.