Omega 900 e vitadur alpha ceramics using three different polishing systems / "Análise in vitro da rugosidade superficial apresentada pelas porcelanas omega 900 e vitadur alpha após a utilização de três diferentes sistemas de polimento"

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

SUMMARY Aesthetic dentistry uses materials that can copy some lost caractheristics of the natural dentition, as color, mechanical resistance and smoothness.The better material for this are the ceramics. On the other hand, it is commum to have to grind them with diamond instruments for adjustment wich removes the glazed surfaces. This procedure can cause abrasion of the opposite teeth, plaque retention, injury of surrounding tissues and low aesthetics qualities. This study evaluated the roughness average in two dental ceramics, Omega 900 e Vitadur Alpha, that were grinding with diamond instruments after the glaze technique, and received three different polishing systems. The control group remained glazed until the end of the research. The groups were: Group A – control; Group B – grinding by fine and ultrafine points + polishing with DFL rubber points + KOTA diamond paste; Group C –grinding by fine and ultrafine points + polishing with rubber points + felt discs + Porcelize diamond paste (Cosmedent); Group D - grinding by fine and ultrafine points + polishing with rubber points + Porcelize + Flexibuff discs + Enamelize polishing paste (Cosmedent). To measure the roughness average in the samples it was used a profilometer Surftest SV-600 with the software Surfpack and the images were observed in the scanning electron microscopy (SEM) to comparation. The results received estatistical analysis using ANOVA and Tukey test (p˜0.05), and a significant tatistical difference was observed between the polishing systems , and in the porcelain/polishing interaction, which showed that all the polishing systems decreased the surface roughness of the porcelains after been grinding with diamond instruments, which was a better result than the control group. In the SEM analysis it was clear the presence of a partial relationship between the profilometer and that one, because here the Omega porcelain showed a more smoothness surface with the glazed treatment compaired with the others, differently from the profilometer analysis

ASSUNTO(S)

dentistica restauradora roughness average dental polishing porcelana dentária dental porcelain polimento dentário rugosidade superficial

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