J Adv Prosthodont.  2015 Feb;7(1):1-7. 10.4047/jap.2015.7.1.1.

Evaluation of shear bond strength between dual cure resin cement and zirconia ceramic after thermocycling treatment

• Lee JJ
• Kang CK
• Oh JW
• Seo JM
• Park JM

• KMID: 1974883
• DOI: http://doi.org/10.4047/jap.2015.7.1.1

Abstract

PURPOSE
This study was performed to evaluate shear bond strength (SBS) between three dual-cured resin cements and silica coated zirconia, before and after thermocycling treatment.
MATERIALS AND METHODS
Sixty specimens were cut in 15 x 2.75 mm discs using zirconia. After air blasting of 50 microm alumina, samples were prepared by tribochemical silica coating with Rocatec(TM) plus. The specimens were divided into three groups according to the dual-cure resin cement used: (1) Calibra silane+Calibra(R), (2) Monobond S+Multilink(R) N and (3) ESPN sil+RelyX(TM) Unicem Clicker. After the resin cement was bonded to the zirconia using a Teflon mold, photopolymerization was carried out. Only 10 specimens in each group were thermocycled 6,000 times. Depending on thermocycling treatment, each group was divided into two subgroups (n=10) and SBS was measured by applying force at the speed of 1 mm/min using a universal testing machine. To find out the differences in SBS according to the types of cements and thermocycling using the SPSS, two-way ANOVA was conducted and post-hoc analysis was performed by Turkey's test.
RESULTS
In non-thermal aged groups, SBS of Multilink group (M1) was higher than that of Calibra (C1) and Unicem (U1) group (P<.05). Moreover, even after thermocycling treatment, SBS of Multilink group (M2) was higher than the other groups (C2 and U2). All three cements showed lower SBS after the thermocycling than before the treatments. But Multilink and Unicem had a significant difference (P<.05).
CONCLUSION
In this experiment, Multilink showed the highest SBS before and after thermocycling. Also, bond strengths of all three cements decreased after thermocycling.

Keyword

Y-TZP zirconia; Resin cement; Shear bond strength; Thermocycling treatment; Silica coating

MeSH Terms

Aluminum Oxide
Ceramics*
Fungi
Polytetrafluoroethylene
Resin Cements*
Silicon Dioxide
Aluminum Oxide
Ceramics
Polytetrafluoroethylene
Resin Cements
Silicon Dioxide

Figure

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  Fig. 1 The specimen (A) and the measurement of the shear bond strength (B) were illustrated by the schematic diagram.

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  Fig. 2 Mean shear bond strength of resin cements before and after thermocycling was shown. Same lowercase letters were not statistically significant (P<.05).

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  Fig. 3 Mean percentage of failure patterns after shear bond strength test.

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  Fig. 4 Scanning electron microscope images of zirconia surface were shown (magnification ×1,000). A: polished with 1 µm diamond paste, B: 50 µm Al2O3 sandblasting, C: Silica coating with Rocatec™ plus, D: Adhesive failure mode of zirconia surface (Calibra), E: Mixed failure mode of zirconia surface (Multilink N), F: Mixed failure mode of zirconia surface (RelyX Unicem).

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