title: Evaluation of microleakage using different bonding agents.
abstract: This study evaluated microleakage in vitro using different bonding agents. Forty-two freshly extracted caries-free human teeth were randomly divided into seven groups of six teeth and restored with different adhesive systems: Single Bond, Prime&Bond NT, Excite, Durafill Bond, Etch&Prime 3.0, Prompt L-Pop and Vitremer as the control group. All groups were treated according to manufacturers' instructions. Class V cavities were prepared on buccal and lingual surfaces (3 x 2.5 x 1.5 mm) of each tooth (12 restorations per group), with gingival margins in dentin. The teeth were restored with Charisma resin composite. After finishing and polishing with Denco-Flex disks, the teeth were thermocycled for 200 cycles (5 degrees C-55 degrees C +/- 2 degrees C, 60-second dwell time). Apical foramina and surfaces around restorations were coated with nail varnish, stained in 50% AgNO3 solution for 12 hours and longitudinally sectioned. Microleakage was evaluated with a stereomicroscope. Marginal penetration was scored on a 0-4 scale. Statistical analysis using the Kruskal-Wallis test revealed significant (p < or = 0.05) leakage at dentin margins for all adhesive systems when compared to the control. Except for Durafill Bond, no significant difference was found between the self-etching adhesives and one-bottle adhesives.
authors.affiliation: Department of Dentistry, School of Health Science, University of Brasília. gagliardiricardo@ig.com.br
authors.forename: Ricardo Maio
authors.initials: RM
authors.lastname: Gagliardi
authors.forename: Rander Pereira
authors.initials: RP
authors.lastname: Avelar
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding; D003763:Dental Leakage; D003793:Dental Restoration, Permanent; D017220:Dentin-Bonding Agents; D011756:Diphosphates; D000431:Ethanol; D005899:Glass Ionomer Cements; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011897:Random Allocation; D019279:Resin Cements
chemical_list: C084111:Charisma composite resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011756:Diphosphates; C121187:Etch&Prime; C420130:Excite cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; C408584:Prompt L-Pop; D019279:Resin Cements; C084550:Vitremer; C470435:durafill bond; C115612:single bond; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate