Surface topography and bond strengths of feldspathic porcelain prepared using various sandblasting pressures

Abstract

Increasing the sandblasting pressure increased the surface roughness of feldspathic porcelain but no difference in bond strength occurred.

In Vitro Evaluation of the Effect of Different Surface Treatments of a Hybrid Ceramic on the Microtensile Bond Strength to a Luting Resin Cement

“…The fractured surface of the SB specimen examined by SEM Aging protocol 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 Non-thermocycled 13 3 0 1 12 3 11 5 0 6 10 0 5 11 0 Thermocycled 15 1 0 2 13 1 9 7 0 6 10 0 1 also revealed a relatively homogenous surface not deeply dented ( Table 2, Figure 2C), which might explain the lower bond strength values compared with the HF group. Hydrofluoric acid chemically reacts with the silica phase of the fine-structured feldspathic component 29 of VE and penetrates into the depth of the hybrid ceramic rather than the merely surface alteration made by sandblasting. 29 Consequently, HF might create more significant microporosities for mechanical interlocking with the resin luting cement.…”

“…Hydrofluoric acid chemically reacts with the silica phase of the fine-structured feldspathic component 29 of VE and penetrates into the depth of the hybrid ceramic rather than the merely surface alteration made by sandblasting. 29 Consequently, HF might create more significant microporosities for mechanical interlocking with the resin luting cement. Kern and Thompson have stated that sandblasting of feldspathic ceramics should be avoided since it can cause a huge volume loss in the materials.…”

Effect of Two Polishing Systems on Surface Roughness, Topography, and Flexural Strength of a Monolithic Lithium Disilicate Ceramic

“…However, in some cases, the roughness values do not truly represent the actual topography of ceramic surfaces because only some areas, and not the whole surface, are probed by the profilometer . Therefore, SEM has also been recommended to obtain more comprehensive results since SEM provides high‐resolution information regarding surface texture details and enhances qualitative assessment of surface topography …”

Qualitative and quantitative evaluations of topography for CAD/CAM all ceramic zirconia after different surface treatments

“…20 Therefore, microscopical pictures have been recommended to yield more comprehensive results. 21,22 Very often the glazing does not reduce the surface roughness as the polishing group, this is might be due to that the coating layer is insufficient thick to effectively complete the ceramic surface micro-cracks and grooves as documented by Kenneth et al, 40 although, in this study, zirconia ceramic samples were reglazed with two layers, unlike in earlier discussed study. 41 So in the current study, the polishing system effectively smoothed sharp relief elevations caused by coarse diamond bur.…”

“…20 Therefore in the present study stereomicroscopic images were used also to yield more comprehensive results. 21,22 Understanding the effect of different surface treatment as, grinding, polishing and reglazing on the surface roughness and surface damage of all-ceramic restorations is therefore critical in the achievement of successful restorations. But to date; assessment of surface damage has been limited.…”