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KMID : 1023820130050030248
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The Journal of Advanced Prosthodontics
2013 Volume.5 No. 3 p.248 ~ p.255
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Effect of various intraoral repair systems on the shear bond strength of composite resin to zirconia
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Han In-Hae
Kang Dong-Wan
Chung Chae-Heon
Choe Han-Cheol
Son Mee-Kyung
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Abstract
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PURPOSE : This study compared the effect of three intraoral repair systems on the bond strength between composite resin and zirconia core.
MATERIALS AND METHODS : Thirty zirconia specimens were divided into three groups according to the repair method: Group I- CoJet™ Repair System (3M ESPE) [chairside silica coating with 30 μm SiO2 + silanization + adhesive]; Group II- Ceramic Repair System (Ivoclar Vivadent) [etching with 37% phosphoric acid + Zirconia primer + adhesive]; Group III- Signum Zirconia Bond (Heraus) [Signum Zirconia Bond I + Signum Zirconia Bond II]. Composite resin was polymerized on each conditioned specimen. The shear bond strength was tested using a universal testing machine, and fracture sites were examined with FE-SEM. Surface morphology and wettability after surface treatments were examined additionally. The data of bond strengths were statistically analyzed with one-way ANOVA and Tamhane post hoc test (α=.05).
RESULTS : Increased surface roughness and the highest wettability value were observed in the CoJet sand treated specimens. The specimens treated with 37% phosphoric acid and Signum Zirconia Bond I did not show any improvement of surface irregularity, and the lowest wettability value were found in 37% phosphoric acid treated specimens. There was no significant difference in the bond strengths between Group I (7.80 ± 0.76 MPa) and III (8.98 ± 1.39 MPa). Group II (3.21 ± 0.78 MPa) showed a significant difference from other groups (P<.05).
CONCLUSION : The use of Intraoral silica coating system and the application of Signum Zirconia Bond are effective for increasing the bond strength of composite resin to zirconia.
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KEYWORD
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Zirconia, Intraoral repair, Composite resin, Bond strength, Surface roughness, Wettability
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