Effects of airborne-particle abrasion protocol choice on the surface characteristics of monolithic zirconia materials and the shear bond strength of resin cement

Abstract

In-Sung Yeo and Seung-Ryong Ha, Effects of airborne-particle abrasion protocol choice on the surface characteristics of monolithic zirconia materials and the shear bond strength of resin cement, Ceramics International, http://dx. AbstractThis study evaluated the effect of several airborne-particle abrasion protocols on the surface characteristics of monolithic zirconia and of protocol choice on the shear bond strength of resin cement. 375 bar-shaped (45×4×3mm) and 500 disc-shaped (Ø9×1mm) monolithic zirconia specimens were divided into 25 groups, respectively. All specimens were abraded with one of three different sizes of alumina particles (25, 50 or 125 μm), two different pressures (2 or 4 bar), two distinct application times (10 or 20s) and two distinct incidence angles (45 or 90°). The bar-shaped specimens were used for 3-point bending test; Weibull parameters were calculated and transformed monoclinic phase (X M ), surface characteristics were examined. The disc-shaped specimens were used to determine the shear bond strength of resin cement before and after thermocycling. All data were analyzed using 4-way ANOVA and a multiple comparison Scheffé test (α=.05). The particle size, pressure and time significantly affected the flexural strength, while the incidence angle was insignificant. The X M and surface roughness were proportional to the size, pressure, time and incidence angle. The Raman spectrum analysis showed a higher proportion of the monoclinic phase as the depth of the specimen was closer to the abraded surface.In bonding with resin cement, the highest shear bond strength after thermocycling was obtained by the abrasion with 50μm particles at 4bar for 20s, regardless of incidence angle. Surface treatment of monolithic zirconia with 50μm particle at 4bar for 20s at either 45° or 90° incidence angles is recommended.

<p>Evaluation Of The Effect Of Different Surface Treatments, Aging And Enzymatic Degradation On Zirconia-Resin Micro-Shear Bond Strength</p>

“…The most common is grit-blasting with aluminum oxide (Al 2 O 3 ) particles using different particle shapes and sizes, and different abrasive times and pressures. 7,8 Grit-blasting produces a micro-roughened zirconia surface that enhances the adhesive bonding by increasing surface energy, wettability and surface area. 9 However, the stress exerted by grit-blasting may lead to cracks on the zirconia surface and further induce tetragonal to monoclinic phase transformation.…”

Biomechanical three-dimensional finite element analysis of monolithic zirconia crown with different cement thickness

“…Therefore, various surface treatments, such as airborne-particle abrasion, have been reported to achieve durable adhesion between zirconia and resin cement [31,32]. Airborne-particle abrasion has provided micromechanical interlocking thank to its ability for increasing surface roughness and modifying the surface energy [31,[33][34][35]. The effect of airborne-particle abrasion may be attributed to an increase in the micromechanical retention that elevates the capability of the resin cement to interlock mechanically onto the zirconia surface [36].…”

“…Lack of vitreous phase in polycrystalline structure makes it difficult to use of hydrofluoric acid etching or silane coupling agent in chemical bonding between zirconia and resin cement. Therefore, various surface treatments, such as airborne-particle abrasion, have been reported to achieve durable adhesion between zirconia and resin cement [31,32]. Airborne-particle abrasion has provided micromechanical interlocking thank to its ability for increasing surface roughness and modifying the surface energy [31,[33][34][35].…”

Optical properties and flexural strength of translucent zirconia layered with high-translucent zirconia

“…ZpexSmile surfaces were mirror polished because it has been reported that final polishing exhibits higher translucency compared to glazing treatment (firing with glaze and stain solution) in which an interface is formed 31) . For cement adhesion, sandblasting and application of functional monomers on TZP surface are recommended because improvements in mechanical interlocking is seen in the former and increased chemical luting is seen in the latter 1,32,33) .…”