Effect of airborne particle abrasion protocols on surface topography of Y-TZP ceramic

Abstract

This study aimed to evaluate Y-TZP surface after different airborne particle abrasion protocols. Seventy-six Y-TZP ceramic blocks (5×4×4) mm 3 were sintered and polished. Specimens were randomly divided into 19 groups (n=4) according to control group and 3 factors: a) protocol duration (2 and 4 s); b) particle size (30 µm, alumina coated silica particle; 45 µm, alumina particle; and 145 µm, alumina particle) and; c) pressure (1.5, 2.5 and 4.5 bar). Airborne particle abrasion was performed following a strict protocol. For qualitative and quantitative results, topography surfaces were analyzed in a digital optical profilometer (Interference Microscopic), using different roughness parameters (Ra, Rq, Rz, X-crossing, Mr1, Mr2 and Sdr) and 3D images. Surface roughness also was analyzed following the primer and silane applications on Y-TZP surfaces. One-way ANOVA revealed that treatments (application period, particle size and pressure of particle blasting) provided significant difference for all roughness parameters. The Tukey test determined that the significant differences between groups were different among roughness parameters. In qualitative analysis, the bonding agent application reduced roughness, filing the valleys in the surface. The protocols performed in this study verified that application period, particle size and pressure influenced the topographic pattern and amplitude of roughness.

Novel Zirconia Surface Treatments for Enhanced Osseointegration: Laboratory Characterization

“…Regarding particle size, Queiroz et al noticed a large difference between R a and R z values in particle abraded specimens due to the presence of deep valleys in the surface for tested specimens. When the 145 μ m alumina particles were used, R z achieved the highest value, suggesting that large particles promoted more punctual damage in a surface than small particles, regardless of the pressure [ 24 ].…”

Surface characteristics and bioactivity of zirconia (Y-TZP) with different surface treatments

“…[ 4 12 , 14 19 , 45 ] Previous stand-alone studies using sandblasting or UVP have reported significant increase in surface roughness as compared to untreated surfaces, and the results obtained in this study are in line with these findings. [ 4 12 , 13 15 , 17 20 , 21 46 ] Comparative studies on surface roughness caused by these surface treatments are lacking, and hence further correlations on this aspect of this study results cannot be drawn.…”

“…Airborne particle abrasion with alumina particles lesser than 100 µm in size has been identified as a key factor in achieving an optimum surface roughness to enhance biological response of osteoblasts without causing structural damage to zirconia. [ 9 11 , 18 20 21 22 ]…”

Surface Characterization and Cell Adhesion of Different Zirconia Treatments: An in vitro Study

“…When a size of 110 μm of particles was used in the tribochemical treatment, Ra and Rz achieved the highest values, suggesting that large particles under pressure induced damage on the surface, which is in accordance with published papers. 38,39 In this study, Ra and Rz were measured to give a better picture of the surface topography, to detect shape of irregularities (valleys and peaks). 40 The surface hardness (VHN) of the tested groups ranged from 703 to 1758.…”