J Korean Acad Prosthodont.  2013 Jan;51(1):20-26. 10.4047/jkap.2013.51.1.20.

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

• Baek CW
• Park CW
• Park JS
• Ryu JJ

• KMID: 2000182
• DOI: http://doi.org/10.4047/jkap.2013.51.1.20

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 - 55degrees C, 5,000 cycle but the other half of them weren't. All specimens were kept in normal saline 37degrees 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.

Keyword

Resin cement; Cerec3; Ceramic inlay; Shear bond strength; Thermocycling

MeSH Terms

Ceramics
Collodion
Dentin
Head
Inlays
Molar
Resin Cements
Tooth
Ceramics
Collodion
Resin Cements

Figure

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  Fig. 1. Cementation of ceramic and prepared specimen.

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  Fig. 2. Shear bond test in universal testing machine.

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  Fig. 3. Shear bond strength values of all groups with/without thermocycling.

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