A comparative study on the effect of polishing systems on the color and surface texture of different porcelain systems - feldspathic, pressable, and computer-aided design/computer-aided manufacturing

Abstract

Aim: To find and compare the qualitative and quantitative change in color and surface texture of feldspathic ceramic, pressable ceramic and ceramic used in computer-aided design/computer-aided manufacturing CAD/CAM after different surface treatments namely glazing, abrading and polishing. To compare the effectiveness of pearl finish polishing paste and Soflex polishing system used in the study. Setting and Design: In-vitro , comparative study. Materials and Methods: Disc-shaped feldsapathic, pressable, CAD/CAM ceramic specimens were fabricated. Surface roughness and color parameters Δ L*, Δa*, and Δ b* were measured before glazing, after glazing, after abrasion with 02 diamond bur and after polishing with two different polishing systems. Surface roughness was measured qualitatively using scanning electron microscopy and quantitatively using an optical profilometer. The value of color parameters was obtained using a colorimeter. Data were statistically analyzed with ANOVA. Statistical Analysis Used: SPSS software 20.0 version (IBM, New York, United states of America). Results: Unglazed feldspathic, pressable and CAD/CAM porcelain specimens showed a mean surface roughness value of 2.73 ± 0.38, 3.54 ± 1.42, and 3 ± 1.74 specimens. After glazing and polishing, the surface roughness values decreased. After abrasion, surface roughness values increased. Polishing did not alter the color along the red green axis and yellow blue axis. Conclusions: Abraded specimens of feldspathic, pressable and CAD/CAM after polishing using pearl finish polishing paste and Soflex disc became smoother than glazed specimens. When pearl finish polishing paste and Soflex discs were compared for their effectiveness the former appeared to be more superior but not to a significant level. Mechanically altering feldspathic, pressable, and porcelain used in CAD/CAM technology does not cause any change in shade.

Sistemas de pulido para restauraciones cerámicas. Revisión de la literatura

“…Por otro lado, Kalia et al compararon dos sistemas de pulido: ruedas de fieltro con pasta de pulido y discos Soflex con superficies glaseadas encontrando que al pulir las muestras utilizando pasta de pulido y discos Soflex, la Ra disminuyó y proporcionó una superficie más lisa que las glaseadas. Sin embargo, cuando se comparó la eficacia de la pasta de pulir y los discos Soflex, la primera parece ser superior, pero no de forma significativa (20).…”

Experimental Study of Surface Roughness of Dental Ceramics After Polishing with Three Types of Polishing Systems

“…They also found that polishing could create residual compressive strength that would further harden the surface of the ceramic restoration. Although various polishing systems for ceramic restoration have been widely studied,[ 2 3 4 5 6 7 8 9 10 11 12 ] most studies focused on the roughness of ceramics polished by their specific ceramic polishing systems compared with other methods such as Sof-Lex,[ 2 ] Identoflex[ 3 4 ] or diamond polishing paste. [ 3 4 5 6 ] Some studies compared the roughness of ceramics between feldspathic and zirconia polishing sets[ 7 8 9 ] or the effectiveness of universal ceramic polishing sets.…”