title: Effect of surface sealants on microleakage of Class II restorations after thermocycling and long-term water storage.
abstract: OBJECTIVE
  To evaluate interface degradation leading to marginal microleakeage in Class II restorations that had received an application of surface sealant at the tooth/restoration interface or not.
  
  
  METHODS
  Eighty bovine incisors were used, and the teeth were split obliquely, 10 mm from the amelodentinal proximal junction, and finished with water abrasive papers to obtain a smooth, flat incisal surface. Cavities were made to simulate Class II preparations (8 mm high, 4 mm wide and 1.5 mm deep), and the restorations were performed with a composite resin. Teeth were then randomly allocated into 8 groups according to the surface sealant (none, Fortify, Single Bond 2, or Scothbond MP Plus) and aging process (none or thermocycling and storage for 6 months). Microleakage was then evaluated using a dye penetration method immediately after the restoration or after aging. The samples were triturated and assessed by spectrophotometer.
  
  
  RESULTS
  Microleakage was statistically similar in all groups when assessed immediately after the restorative procedure. After aging, teeth sealed with Fortify presented better results than the other groups.
  
  
  CONCLUSIONS
  Aging causes interface degradation and increased microleakage. Surface sealant can reduce these effects and decrease microleakage in Class II restorations.
authors: Department of Restorative Dentistry, Piracicaba School of Dentistry, State University of Campinas, Brazil.
authors: Adriano Fonseca
authors: AF
authors: Lima
authors: Giulliana Panfiglio
authors: GP
authors: Soares
authors: Pedro Henrique
authors: PH
authors: Vasconcellos
authors: Gláucia Maria
authors: GM
authors: Ambrosano
authors: Giselle Maria
authors: GM
authors: Marchi
authors: José Roberto
authors: JR
authors: Lovadino
authors: Flávio Henrique
authors: FH
authors: Aguiar
mesh_terms: D000818:Animals; D002417:Cattle; D003188:Composite Resins; D001840:Dental Bonding; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods; D003799:Dental Stress Analysis; D004356:Drug Storage; D008422:Materials Testing; D019279:Resin Cements; D013053:Spectrophotometry; D013499:Surface Properties; D019237:Tooth Cervix; D014867:Water
chemical_list: D003188:Composite Resins; D019279:Resin Cements; D014867:Water