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http://dx.doi.org/10.4047/jkap.2013.51.1.20

Shear bond strength of the three different kinds of resin cement on CAD/CAM ceramic inlay  

Baek, Chul-Woo (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University)
Park, Cheol-Woo (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University)
Park, Jun-Sub (Goodwill Dental Hospital)
Ryu, Jae-Jun (Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.51, no.1, 2013 , pp. 20-26 More about this Journal
Abstract
Purpose: The purpose of this study was to evaluate the bond strengths between the latest CAD/CAM ceramic inlay and various resin cements which are used primarily for esthetic restoration. Materials and methods: Cylindrical ceramic blocks(Height: 5 mm, diameter: 3 mm) were fabricated by using Cerec3 and bonded on the dentin of the ninety extracted caries-free molars using three different kinds of resin cement(Unicem$^{(R)}$, Biscem$^{(R)}$, and Variolink II$^{(R)}$) according to the manufacturer's instructions. Ninety specimens were divided into 3 groups according to three different kinds of resin cement. Half of each group were conducted thermocycling under the conditions of the $5-55^{\circ}C$, 5,000 cycle but the other half of them weren't. All specimens were kept in normal saline $37^{\circ}C$, for 24 hours before measuring the bond strength. The shear bond strength was measured by Universal testing machine with a cross head speed of 0.5 mm/min. The results were analyzed statistically by t-test and one-way ANOVA. Results: Unicem$^{(R)}$ group showed the highest shear bond strength despite a slight decline by thermocycling. The shear bond strength of Unicem$^{(R)}$ group and ValiolinkII$^{(R)}$ group were significantly influenced by thermocycling, whereas Biscem$^{(R)}$ group was not influenced (P<.05). There were no significant differences in the bond strength between the three groups without thermocycling, but there was significant differences between Unicem$^{(R)}$ group and Valiolink II$^{(R)}$ group with thermocycling(P<.05). Conclusion: It has been shown to be clinically effective when the self-adhesive resin cements Unicem$^{(R)}$ and Biscem$^{(R)}$ were used instead of the etch-and-rinse resin cement Valiolink II$^{(R)}$ during the bonding of CAD/CAM ceramic inlay restorations with teeth.
Keywords
Resin cement:Cerec3:Ceramic inlay:Shear bond strength:Thermocycling;
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