title: Influence of surface sealants on microleakage of composite resin restorations.
abstract: OBJECTIVE
  The purpose of this study was to verify the influence of surface sealants and dentin adhesive systems on the microleakage of composite restorations.
  
  
  METHODS
  Class V cavities were made on the buccal faces of 100 permanent third molars and restored with Z250. After 24 hours, they were submitted to polishing and finishing processes. The teeth were divided into groups according to the sealant agent: group 1--Single Bond; group 2--Opti Bond Solo Plus; group 3--Fortify; group 4--Fortify Plus; and group 5--control without sealant. The analysis of immediate microleakage was performed in 10 restorations from each group, soon after the sealing. The other 10 specimens from each group were submitted to tooth-brushing and thermal cycles. The teeth were isolated and immersed in 2% methylene blue solution, washed in tap water, and sectioned in the buccolingual direction. The percentage of marginal leakage was calculated using an image analysis program, and results were submitted to analysis of variance and Tukey's test.
  
  
  RESULTS
  All the sealed groups demonstrated lower microleakage values compared to the control group. Group 3, sealed with Fortify, presented the lowest mean microleakage values.
  
  
  CONCLUSIONS
  The application of surface sealants effectively decreased the microleakage in composite resin restorations.
authors.affiliation: Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University, Araçatuba, Brazil. paulosantos@foa.unesp.br
authors.forename: Paulo Henrique
authors.initials: PH
authors.lastname: dos Santos
authors.forename: Sabrina
authors.initials: S
authors.lastname: Pavan
authors.forename: Wirley Gonçalves
authors.initials: WG
authors.lastname: Assunção
authors.forename: Simonides
authors.initials: S
authors.lastname: Consani
authors.forename: Lourenço
authors.initials: L
authors.lastname: Correr-Sobrinho
authors.forename: Mario Alexandre Coelho
authors.initials: MA
authors.lastname: Sinhoreti
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D006801:Humans; D008964:Molar, Third; D019279:Resin Cements
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C095811:Fortify sealant; C428805:OptiBond SOLO; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate