Tensile bond strength of an aged resin composite repaired with different protocols

• Published in: The journal of adhesive dentistry Vol. 13; no. 4; p. 359
• Main Authors: Celik, Esra Uzer, Ergücü, Zeynep, Türkün, L Sebnem, Ercan, Utku Kürșat
• Format: Journal Article
• Language: English
• Published: Germany 01.08.2011
• Subjects: Acid Etching, Dental; Composite Resins; Dental Bonding; Dental Restoration Repair - methods; Dental Stress Analysis; Dentin-Bonding Agents; Diamond; Resin Cements; Silanes; Surface Properties; Tensile Strength
• ISSN: 1461-5185
• DOI: 10.3290/j.jad.a19651

To evaluate the effect of different surface treatments and bonding procedures on the tensile bond strength (TBS) of resin composites repaired 6 months after polymerization. Resin composite sticks were aged in distilled water at 37°C for 6 months. They were divided into 12 groups (n = 10) according to the combination of surface treatment/bonding procedures [none, only bur treatment, XP Bond (XPB/Dentsply/DeTrey) with/without bur, AdheSE (A-SE/Ivoclar/Vivadent) with/without bur, Composite Primer (CP/GC) with/without bur, CP after bur and acid-etching, XPB after acid etching and CP with bur, A-SE after bur and CP]. The ultimate tensile bond strength (UTS) of the resin composites was tested in intact but aged specimens. Tensile bond strengths were tested with a universal testing machine (Shimadzu). Data were analyzed using one-way ANOVA and Duncan Multiple Comparisons tests (p < 0.05). All repaired groups showed significantly higher TBS than the group without any sureface treatment (p < 0.05). Four groups resulted in TBS similar to those of intact resin composite UTS: A-SE, A-SE with bur, A-SE after CP with bur, and XPB after acid etching+CP with bur. Bur treatment, silane primer or etch-and-rinse adhesive application alone were not successful in the repair process of aged resin composite, whereas self-etching adhesive alone showed similar performance to the intact specimens. Combined procedures generally showed better performance: A-SE with bur, A-SE after CP with bur, and XPB after acid etching +CP with bur showed TBS similar to those of the intact specimens. It was concluded that bur roughening of the surfaces and rebonding procedures were essential for repairing aged resin composites.