Restor Dent Endod.  2016 May;41(2):106-113. 10.5395/rde.2016.41.2.106.

Orthodontic bracket bonding to glazed full-contour zirconia

• Kwak JY
• Jung HK
• Choi IK
• Kwon TY

• KMID: 2163292
• DOI: http://doi.org/10.5395/rde.2016.41.2.106

Abstract

OBJECTIVES
This study evaluated the effects of different surface conditioning methods on the bond strength of orthodontic brackets to glazed full-zirconia surfaces.
MATERIALS AND METHODS
Glazed zirconia (except for the control, Zirkonzahn Prettau) disc surfaces were pre-treated: PO (control), polishing; BR, bur roughening; PP, cleaning with a prophy cup and pumice; HF, hydrofluoric acid etching; AA, air abrasion with aluminum oxide; CJ, CoJet-Sand. The surfaces were examined using profilometry, scanning electron microscopy, and electron dispersive spectroscopy. A zirconia primer (Z-Prime Plus, Z) or a silane primer (Monobond-S, S) was then applied to the surfaces, yielding 7 groups (PO-Z, BR-Z, PP-S, HF-S, AA-S, AA-Z, and CJ-S). Metal bracket-bonded specimens were stored in water for 24 hr at 37℃, and thermocycled for 1,000 cycles. Their bond strengths were measured using the wire loop method (n = 10).
RESULTS
Except for BR, the surface pre-treatments failed to expose the zirconia substructure. A significant difference in bond strengths was found between AA-Z (4.60 ± 1.08 MPa) and all other groups (13.38 ± 2.57 - 15.78 ± 2.39 MPa, p < 0.05). For AA-Z, most of the adhesive remained on the bracket.
CONCLUSIONS
For bracket bonding to glazed zirconia, a simple application of silane to the cleaned surface is recommended. A zirconia primer should be used only when the zirconia substructure is definitely exposed.

Keyword

Adhesive; Bonding; Orthodontic brackets; Zirconia

MeSH Terms

Adhesives
Aluminum Oxide
Hydrofluoric Acid
Microscopy, Electron, Scanning
Orthodontic Brackets*
Spectrum Analysis
Water
Adhesives
Aluminum Oxide
Hydrofluoric Acid
Water

Figure

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  Figure 1 Representative cross-sectional SEM image of the glazed full-zirconia ceramic (original magnification ×200, bar represents 100 µm). ER, epoxy resin for embedding; GL, glaze layer; ZC, zirconia ceramic.

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  Figure 2 Topographic SEM images and corresponding EDS spectra of the surfaces subjected to 6 different pre-treatments. Note that only the PO and BR spectra show Zr peaks. PO, polishing unglazed zirconia; BR, bur roughening; PP, cleaning with a prophy cup and pumice; HF, hydrofluoric acid etching; AA, air-particle abrasion with aluminum oxide; CJ, silicon dioxide [CoJet-Sand] particles.

Reference

1. Lifshitz AB, Cárdenas M. A comparison between the shear bond strength of brackets bonded to glazed and deglazed porcelain surfaces with resin-reinforced glassionomer cement and a bis-GMA resin adhesive. World J Orthod. 2006; 7:134–137.

2. Trakyali G, Malkondu O, Kazazoğlu E, Arun T. Effects of different silanes and acid concentrations on bond strength of brackets to porcelain surfaces. Eur J Orthod. 2009; 31:402–406.

3. Maryanchik I, Brendlinger EJ, Fallis DW, Vandewalle KS. Shear bond strength of orthodontic brackets bonded to various esthetic pontic materials. Am J Orthod Dentofacial Orthop. 2010; 137:684–689.

4. Blakey R, Mah J. Effects of surface conditioning on the shear bond strength of orthodontic brackets bonded to temporary polycarbonate crowns. Am J Orthod Dentofacial Orthop. 2010; 138:72–78.

5. Abu Alhaija ES, Al-Wahadni AM. Shear bond strength of orthodontic brackets bonded to different ceramic surfaces. Eur J Orthod. 2007; 29:386–389.

6. Wang C, Zeng J, Wang S, Yang Z, Huang Q, Chen P, Zhou S, Liu X. Influence of surface treatments on the shear bond strength of orthodontic brackets to porcelain. Appl Surf Sci. 2008; 255:416–418.

7. Özcan M, Vallittu PK, Peltomäki T, Huysmans MC, Kalk W. Bonding polycarbonate brackets to ceramic: effects of substrate treatment on bond strength. Am J Orthod Dentofacial Orthop. 2004; 126:220–227.

8. Kim MJ, Kim YK, Kim KH, Kwon TY. Shear bond strengths of various luting cements to zirconia ceramic: surface chemical aspects. J Dent. 2011; 39:795–803.

9. Kasraei S, Rezaei-Soufi L, Heidari B, Vafaee F. Bond strength of resin cement to CO2 and Er:YAG laser-treated zirconia ceramic. Restor Dent Endod. 2014; 39:296–302.

10. Komine F, Strub JR, Matsumura H. Bonding between layering materials and zirconia frameworks. Jpn Dent Sci Rev. 2012; 48:153–161.

11. Guess PC, Schultheis S, Bonfante EA, Coelho PG, Ferencz JL, Silva NR. All-ceramic systems: laboratory and clinical performance. Dent Clin North Am. 2011; 55:333–352.

12. Zhang Y, Kim JW. Graded structures for damage resistant and aesthetic all-ceramic restorations. Dent Mater. 2009; 25:781–790.

13. Fabianelli A, Pollington S, Papacchini F, Goracci C, Cantoro A, Ferrari M, van Noort R. The effect of different surface treatments on bond strength between leucite reinforced feldspathic ceramic and composite resin. J Dent. 2010; 38:39–43.

14. Dos Santos VH, Griza S, de Moraes RR, Faria-E-Silva AL. Bond strength of self-adhesive resin cements to composite submitted to different surface pretreatments. Restor Dent Endod. 2014; 39:12–16.

15. Ha JY, Son JS, Kim YK, Kim KH, Kwon TY. Effect of heat treatment of dental zirconia ceramic treated with three different primers on the bonding durability of resin cement. Macromol Res. 2013; 21:71–77.

16. Shon WJ, Kim TW, Chung SH, Jung MH. The effects of primer precuring on the shear bond strength between gold alloy surfaces and metal brackets. Eur J Orthod. 2012; 34:72–76.

17. Zachrisson YO, Zachrisson BU, Büyükyilmaz T. Surface preparation for orthodontic bonding to porcelain. Am J Orthod Dentofacial Orthop. 1996; 109:420–430.

18. Goracci C, Margvelashvili M, Giovannetti A, Vichi A, Ferrari M. Shear bond strength of orthodontic brackets bonded with a new self-adhering flowable resin composite. Clin Oral Investig. 2013; 17:609–617.

19. Mojtahedzadeh F, Akhoundi MS, Noroozi H. Comparison of wire loop and shear blade as the 2 most common methods for testing orthodontic shear bond strength. Am J Orthod Dentofacial Orthop. 2006; 130:385–387.

20. Ryou DB, Park HS, Kim KH, Kwon TY. Use of flowable composites for orthodontic bracket bonding. Angle Orthod. 2008; 78:1105–1109.

21. Magne P, Paranhos MP, Burnett LH Jr. New zirconia primer improves bond strength of resin-based cements. Dent Mater. 2010; 26:345–352.

22. Al-Hity R, Gustin MP, Bridel N, Morgon L, Grosgogeat B. In vitro orthodontic bracket bonding to porcelain. Eur J Orthod. 2012; 34:505–511.

23. Chaiyabutr Y, McGowan S, Phillips KM, Kois JC, Giordano RA. The effect of hydrofluoric acid surface treatment and bond strength of a zirconia veneering ceramic. J Prosthet Dent. 2008; 100:194–202.

24. Preis V, Behr M, Hahnel S, Handel G, Rosentritt M. In vitro failure and fracture resistance of veneered and full-contour zirconia restorations. J Dent. 2012; 40:921–928.

25. Mitov G, Heintze SD, Walz S, Woll K, Muecklich F, Pospiech P. Wear behavior of dental Y-TZP ceramic against natural enamel after different finishing procedures. Dent Mater. 2012; 28:909–918.

26. de Oliveira AS, Mirapalhete RC, Amaral CC, de Moraes RR. A modified photoactivation protocol using two simultaneous light-curing units for bonding brackets to enamel. Braz Dent J. 2015; 26:393–397.

27. Ahn HB, Ahn SJ, Lee SJ, Kim TW, Nahm DS. Analysis of surface roughness and surface free energy characteristics of various orthodontic materials. Am J Orthod Dentofacial Orthop. 2009; 136:668–674.