Abstract
Objectives: To measure the shear bond strengths of various luting cements to a sandblasted zirconia ceramic and to determine the surface energy parameters of the luting cements. Methods: Two conventional glass ionomer cements, two resin-modified glass ionomer cements, two compomer cements, and two adhesive resin cements were prepared and bonded to sandblasted zirconia (Lava). All bonded specimens were stored in water at 37 °C for 48 h and then half of them additionally thermocycled 10,000 times prior to the shear bond strength test (n = 10). Surface roughness (R a) values and surface energy parameters of the eight luting cements and polished zirconia ceramic were evaluated using a profilometer and contact angle measurements, respectively (n = 10). The bond strength and surface roughness data were statistically analysed using non-parametric and parametric procedures, respectively (α = 0.05). Relationships between surface energy parameters and measured shear bond strengths were investigated using the Spearman rank correlation test. Results: Panavia F 2.0 and Principle produced higher bond strengths than the other cements, with no significant changes before and after thermocycling. Fuji I, Ketac Cem Easymix, and Ionotite F yielded near-zero or zero values after thermocycling. All debonded specimens showed adhesive failure. Mean R a values ranged from 0.104 to 0.167 μm. We found the base (hydrogen bond accepting) components of the luting cements significantly affected the bond strengths both before and after thermocycling. Conclusion: It is recommended that the surface energy parameters of luting cements be considered in evaluating their adhesive properties with zirconia ceramic.
Original language | English |
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Pages (from-to) | 795-803 |
Number of pages | 9 |
Journal | Journal of Dentistry |
Volume | 39 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2011 |
Keywords
- Luting cement
- Shear bond strength
- Surface energy parameter
- Thermocycling
- Zirconia ceramic