title: Microleakage of hydrophilic adhesive systems in Class V composite restorations.
abstract: OBJECTIVE
  To investigate the microleakage of four hydrophilic adhesive systems: one "multiple-bottles" (Scotchbond Multi-Purpose Plus); two "one-bottle" (Single Bond, Stae); and one self-etching (Etch & Prime 3.0).
  
  
  METHODS
  120 bovine incisor teeth were divided into four groups (n = 30) and Class V cavities were prepared at the cemento-enamel junction. The cavities were restored with the adhesive systems and with Z100 composite. The teeth were thermocycled 1,000 times between 5+/-2 degrees C and 55+/-2 degrees C with a dwell time of 1 min, and then placed in a 2% methylene blue dye (pH 7.0) for 4 hrs, washed and sectioned vertically through the center of the restorations. The qualitative evaluation was made by three examiners who distributed pre-established scores (0-4) for each tooth using a stereomicroscope at x30 magnification.
  
  
  RESULTS
  In enamel margins little microleakage was observed and the Kruskal-Wallis analysis did not show differences. In dentin margins the Kruskal-Wallis and multiple comparison analyses were applied: microleakage was significantly greater with Stae (median 3) and Scotchbond MP Plus (median 4). Single Bond (median 1) and Etch & Prime 3.0 (median 2) showed the best results in dentin margins, and the statistical analysis did not demonstrate differences in microleakage among these groups.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry of Piracicaba, University of Campinas, Brazil.
authors.forename: C M
authors.initials: CM
authors.lastname: Amaral
authors.forename: A T
authors.initials: AT
authors.lastname: Hara
authors.forename: L A
authors.initials: LA
authors.lastname: Pimenta
authors.forename: A L
authors.initials: AL
authors.lastname: Rodrigues
mesh_terms: D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000145:classification*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D011756:Diphosphates / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry; D007180:Incisor; D008689:Methacrylates / Q000737:chemistry; D008751:Methylene Blue; D015588:Observer Variation; D019279:Resin Cements / Q000737:chemistry; D012822:Silicon Dioxide; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013696:Temperature; D013816:Thermodynamics; D019237:Tooth Cervix / Q000648:ultrastructure; D017155:Wettability; D015040:Zirconium
chemical_list: D004396:Coloring Agents; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011756:Diphosphates; C121187:Etch&Prime; D008689:Methacrylates; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C403634:Stae bonding agent; C083568:Z100 composite resin; C115612:single bond; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D015040:Zirconium; D008751:Methylene Blue