Bonding of resin composite luting cements to zirconium oxide by two air-particle abrasion methods.
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.
Kumbuloglu
Ovul
O
Biomechanical Testing Laboratory, University of Turku, Institute of Dentistry, Finland. kumbuloglu@hotmail.com
Lassila
Lippo V J
LV
User
Atilla
A
Vallittu
Pekka K
PK
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*
C438843:Panavia-Fluoro; C483701:Rely X Unicem; D019279:Resin Cements; D015040:Zirconium; C028541:zirconium oxide