title: Effect of 1-bottle light-cured adhesive acidity on microleakage of a self-cured composite.
abstract: This in vitro study examined the effect of 1-bottle light-cured adhesives with different acidities on the microleakage of a self-cured composite in Class II restorations. Forty-five Class II cavities were prepared on the proximal surfaces of extracted human intact third molars that were randomly assigned to 3 groups (15 cavities in each group). The following adhesives were applied according to the manufacturer's instructions: Single Bond (Group 1), Excite (Group 2) and One-Step (Group 3). The teeth were restored with a combination of a self-cured resin composite (Concise) and a light-cured resin composite (Filtek P60). After thermocycling (500 cycles at 5 degrees C/55 degrees C) and immersion in 2% basic Fushin, the teeth were sectioned and evaluated for microleakage using a stereomicroscope (16x). Microleakage was scored on a scale of 0 to 3. Kruskal-Wallis analysis showed that there was a significant-difference in microleakage values of 3 adhesives with a self-cured composite, and low pH may have contributed to high microleakage values. Also, 2 by 2 comparisons with the Mann-Whitney U-test revealed a significant difference at the p<0.05 level between Groups 1 and 2 and between Groups 2 and 3. However, there was no statistically significant difference between Groups 1 and 3.
authors.affiliation: Department of Operative Dentistry, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran. kimyais@tbzmed.ac.ir
authors.forename: Soodabeh
authors.initials: S
authors.lastname: Kimyai
authors.forename: Siavash Savadi
authors.initials: SS
authors.lastname: Oskoee
mesh_terms: D000134:Acid Etching, Dental / Q000009:adverse effects* / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000009:adverse effects / Q000737:chemistry; D003188:Composite Resins / Q000009:adverse effects / Q000737:chemistry*; D003763:Dental Leakage / Q000209:etiology*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000379:methods; D017220:Dentin-Bonding Agents / Q000009:adverse effects / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008964:Molar, Third; D044367:Phase Transition; D019279:Resin Cements / Q000009:adverse effects / Q000737:chemistry*; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C443708:P60 Condensible Resin Composite; D019279:Resin Cements; D017438:Bisphenol A-Glycidyl Methacrylate