Abstract
Statement of problem
Conventional approaches to adhesive bonding are not applicable to zirconia restorations.
Recently, an etching solution, Zeta Etching Solution (ZES), has been introduced for
etching the surface of zirconia. The effects of this etching solution on the bond
strength and mechanical properties of zirconia are unknown.
Purpose
The purpose of this in vitro study was to examine the effects of ZES on the bond strength
and surface hardness of zirconia.
Material and methods
Two different types of partially stabilized tetragonal polycrystalline zirconia (TZP),
Prettau zirconia (group P) and anterior Prettau (group AP), were evaluated with and
without ZES etching. Each group was bonded to a zirconia substrate by using an adhesive
resin cement. After 24 hours of storage in distilled water, the bond strength of the
zirconia was analyzed. Vickers hardness was determined by using a microhardness tester.
Scanning electron microscopy was used to analyze the surface microstructure and determine
the mode of failure for each specimen. Results were analyzed and compared using 1-way
ANOVA and Student t tests (α=.05).
Results
Scanning electron microscopy analysis showed that etching the surface of zirconia
with ZES etching solution for 60 minutes changed the morphological characteristics
and microstructure of zirconia, making the surface more irregular. The changes were
more pronounced for AP specimens. Etching with ZES significantly increased the shear
bond strength of zirconia (P<.05) in AP specimens. The bond strength of Prettau (P group) specimens after ZES
etching did not increase significantly (P>.05). An adhesive failure mode was observed for P zirconia specimens, whereas zirconia
specimens exhibited a cohesive mode of failure. No significant decrease (P>.05) was observed in the mean Vickers hardness numbers.
Conclusions
Within the limitations of this in vitro study, it was concluded that etching in ZES
for 30 minutes significantly enhanced the shear bond strength of highly translucent
anterior Prettau (AP) zirconia restorations. Moreover, etching with ZES did not adversely
affect the surface hardness of the zirconia specimens tested.
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References
- State of the art of zirconia for dental applications.Dent Mater. 2008; 24: 299-307
- Stabilized zirconia as a structural ceramic: an overview.Dent Mater. 2008; 24: 289-298
- Emerging ceramic-based materials for dentistry.J Dent Res. 2014; 93: 1235-1242
- Resin-ceramic bonding: a review of the literature.J Prosthet Dent. 2003; 89: 268-274
- Bond strength of resin cement to dentin and to surface-treated posts of titanium alloy, glass fiber, and zirconia.J Adhes Dent. 2003; 5: 153-162
- Strength, reliability and mode of fracture of bilayered porcelain/zirconia (Y-TZP) dental ceramics.Biomaterials. 2004; 25: 5045-5052
- Adhesion/cementation to zirconia and other non-silicate ceramics: where are we now?.Dent Mater. 2011; 27: 71-82
- Strength and reliability of surface treated Y-TZP dental ceramics.J Biomed Mater Res Part B Appl Biomater. 2000; 53: 304-313
- Dental zirconia can be etched by hydrofluoric acid.Dent Mater J. 2014; 33: 79-85
- Effect of hydrofluoric acid concentration and etching duration on select surface roughness parameters for zirconia.J Prosthet Dent. 2015; 113: 596-602
- The effect of hydrofluoric acid surface treatment and bond strength of a zirconiaveneering ceramic.J Prosthet Dent. 2008; 100: 194-202
- Effect of surface pre-treatments on the zirconia ceramic-resin cement microtensilebond strength.Dent Mater. 2011; 27: 1024-1030
- In vitro evaluation of shear bond strengths of resin to densely-sintered high-purity zirconium-oxide ceramic after long-term storage and thermal cycling.J Prosthet Dent. 2004; 91: 356-362
- Influence of surface treatment and simulated aging on bond strengths of luting agents to zirconia.Quintessence Int. 2007; 38: 745-753
- Effect of zirconia surface treatment using nitric acid-hydrofluoric acid on the shear bondstrengths of resin cements.J Adv Prosthodont. 2017; 9: 77-84
- Effects of incorporation of hydroxyapatite and fluoroapatite nanobioceramics into conventional glass ionomer cements (GIC).Acta Biomater. 2008; 4: 432-440
- Measure of microhardness, fracture toughness and flexural strength of N-vinylcaprolactam (NVC)-containing glass-ionomer dental cements.Dent Mater. 2010; 26: 1137-1143
- Comparison of alternative adhesive cementation concepts for zirconia ceramic: glaze layer vs zirconia primer.J Adhes Dent. 2012; 14: 75-82
- Bonding of resin cement to zirconia with high pressure primer coating.PLoS One. 2014; 9: 101174-101177
- Influence of surface treatment of yttrium-stabilized tetragonal zirconium oxides and cement type on crown retention after artificial aging.J Prosthet Dent. 2014; 111: 395-403
- Selective infiltration-etching technique for a strong and durable bond of resin cements to zirconia-based materials.J Prosthet Dent. 2007; 98: 379-388
- Bonding to zirconia ceramic: adhesion methods and their durability.Dent Mater. 1998; 14: 64-71
- Long-term resin bonding to zirconia ceramic with a new universal primer.J Prosthet Dent. 2001; 106: 319-327
- Strength, toughness and aging stability of highly-translucent Y-TZP ceramics for dental restorations.Dent Mater. 2016; 32: 327-337
- A comparative evaluation of the translucency of zirconias and lithium disilicate for monolithic restorations.J Prosthet Dent. 2016; 116: 257-263
- Bond strength of metal–ceramic systems in three-point flexure bond test.J Appl Biomater. 1995; 6: 55-64
- Bond strength and interfacial characterization of eight low fusing porcelains to cp Ti.Dent Mater. 2010; 26: 264-273
Article info
Publication history
Published online: April 24, 2018
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© 2017 by the Editorial Council for The Journal of Prosthetic Dentistry.