title: Bonding of resin composite luting cements to zirconium oxide by two air-particle abrasion methods.
abstract: OBJECTIVE
  This study evaluated the shear bond strength of two resin composite luting cements to zirconium oxide ceramic substrate using two air-particle abrasion methods.
  
  
  METHODS
  Two resin composite cements, RelyX Unicem (3M ESPE) and Panavia F (Kuraray), each with an acidic composition, were used in combination with a zirconium oxide (DCS Dental AG) substrate containing Al2O3 and SiO2 (Rocatec system, 3M ESPE) and two air-particle abrasion methods. The shear bond strength of the resin composite cement to the substrate was tested after the samples were either water-stored for one week or thermocycled following 24 hours of water storage.
  
  
  RESULTS
  The RelyX Unicem resin composite cement specimens with the Rocatec treatment (20.9 +/- 4.6 Mpa and 20.1 +/- 4.2 MPa, respectively, n = 12) demonstrated the highest shear bond strength. Alternatively, the lowest values were obtained for the Panavia F resin cement samples, with Al2O3 air-particle abrasion in both storage conditions, water storage for one week (17.7 +/- 8.9MPa) or thermocycling after 24 hours of water storage (16.3 +/- 4.9 MPa). Neither storage condition or particle abrasion system significantly affected shear bond strengths (ANOVA, p > 0.05).
  
  
  CONCLUSIONS
  It was concluded that two different surface conditioning methods and storage conditions did not significantly affect the bonding properties of Panavia F and RelyX Unicem resin composite luting cements to Zirconia.
authors.affiliation: Biomechanical Testing Laboratory, University of Turku, Institute of Dentistry, Finland. kumbuloglu@hotmail.com
authors.forename: Ovul
authors.initials: O
authors.lastname: Kumbuloglu
authors.forename: Lippo V J
authors.initials: LV
authors.lastname: Lassila
authors.forename: Atilla
authors.initials: A
authors.lastname: User
authors.forename: Pekka K
authors.initials: PK
authors.lastname: Vallittu
mesh_terms: D020906:Air Abrasion, Dental / Q000009:adverse effects* / Q000379:methods; D001840:Dental Bonding / Q000379:methods*; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D015040:Zirconium / Q000008:administration & dosage*
chemical_list: C438843:Panavia-Fluoro; C483701:Rely X Unicem; D019279:Resin Cements; D015040:Zirconium; C028541:zirconium oxide