title: Microtensile bond strength of a resin cement to silica-coated and silanized In-Ceram Zirconia before and after aging.
abstract: OBJECTIVE
  This study compared the microtensile bond strength of resin-based cement (Panavia F) to silica-coated, silanized, glass-infiltrated high-alumina zirconia (In-Ceram Zirconia) ceramic in dry conditions and after various aging regimens.
  
  
  METHODS
  The specimens were placed in 1 of 4 groups: group 1: dry conditions (immediate testing without aging); group 2: water storage at 37 degrees C for 150 days; group 3: 150 days of water storage followed by thermocycling (x 12,000, 5 degrees C to 55 degres C); group 4: water storage for 300 days; group 5: water storage for 300 days followed by thermocycling.
  
  
  RESULTS
  Group 1 showed a significantly higher microtensile bond strength value (26.2 + 1 MPa) than the other aging regimens (6.5 +/-1, 6.2 +/-2, 4.5+/-1, 4.3+/-1 MPa for groups 2, 3, 4, and 5, respectively) (P < .01).
  
  
  CONCLUSIONS
  Satisfactory results were seen in dry conditions, but water storage and thermocycling resulted in significantly weaker bonds between the resin cement and the zirconia.
authors.affiliation: Department of Dental Materials and Prosthodontics, São Paulo State University, São Jose dos Campos, Brazil.
authors.forename: Luiz Felipe
authors.initials: LF
authors.lastname: Valandro
authors.forename: Mutlu
authors.initials: M
authors.lastname: Ozcan
authors.forename: Regina
authors.initials: R
authors.lastname: Amaral
authors.forename: Fabiola Pessoa Pereira
authors.initials: FP
authors.lastname: Leite
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Bottino
mesh_terms: D003776:Dental Porcelain / Q000737:chemistry*; D006358:Hot Temperature / Q000009:adverse effects; D019279:Resin Cements / Q000737:chemistry*; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000009:adverse effects
chemical_list: C485633:In-Ceram Zirconia; C438843:Panavia-Fluoro; D019279:Resin Cements; D014867:Water; D003776:Dental Porcelain