J Adv Prosthodont.  2013 Aug;5(3):248-255. 10.4047/jap.2013.5.3.248.

Effect of various intraoral repair systems on the shear bond strength of composite resin to zirconia

• Han IH
• Kang DW
• Chung CH
• Choe HC
• Son MK

• KMID: 2118163
• DOI: http://doi.org/10.4047/jap.2013.5.3.248

Abstract

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(TM) Repair System (3M ESPE) [chairside silica coating with 30 microm 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 (alpha=.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.

Keyword

Zirconia; Intraoral repair; Composite resin; Bond strength; Surface roughness; Wettability

MeSH Terms

Ceramics
Collodion
Phosphoric Acids
Polymers
Silicon Dioxide
Wettability
Zirconium
Ceramics
Collodion
Phosphoric Acids
Polymers
Silicon Dioxide
Zirconium

Figure

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  Fig. 1 (A) zirconia specimens and (B) test specimen embedded in mounting media.

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  Fig. 2 Schematic drawing of tested specimen in testing apparatus.

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  Fig. 3 FE-SEM images (magnification ×1000, left) and 3D-OM images (right) of the zirconia surface after different surface treatments. (A) Polished, (B) diamond bur treated, (C) Group I, CoJet sand treated, (D) Group II, 37% phosphoric acid etching, (E) Group III, Zirconia Bond I applied.

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  Fig. 4 Contact angle values of zirconia surface after different surface treatments. (A) Polished, (B) Diamond bur treated, (C) Group I, CoJet sand treated, (D) Group II, 37% phosphoric acid etching, (E) Group III, Zirconia Bond I applied.

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  Fig. 5 FE-SEM images of the interfacial patterns observed in Group I. (A) Fractured surface after the shear test, zirconia side (magnification ×40), (B) High magnification of arrow area in A (magnification ×1000). Retained bonding agent remnants were detected.

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  Fig. 6 FE-SEM images of the interfacial patterns observed in Group II. (A) Fractured surface after the shear test, zirconia side (magnification ×50), (B) High magnification of arrow area in A (magnification ×1000). No residue of bonding agent and resin was detectable on the surface.

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  Fig. 7 FE-SEM images of the interfacial patterns observed in Group III. (A) Fractured surface after the shear test, zirconia side (magnification ×45), (B) High magnification of arrow area in A (magnification ×1000). Retained bonding agent remnants were detected.

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