Surface roughness of monolithic zirconia ceramic submitted to different polishing systems
Braz. j. oral sci
;
18: e191643, jan.-dez. 2019. ilus
Artigo
em Inglês
| LILACS, BBO
| ID: biblio-1095224
ABSTRACT
Aim:
The objective was to evaluate, quantitative and qualitative, the abrasive effect of three polishing systems on the monolithic zirconia ceramic.Methods:
Thirty disk-shaped samples of Yttria Tetragonal Zirconia Polycrystal (Y-TZP) were randomly distributed in three groups (n = 10) according to polishing system G1- Komet system (KO); G2 - CeraGloss system (CG); G3 - Eve Diacera system (EV). The surface roughness (Ra) was obtained with Rugosimeter in four different moments a) initial - glaze sample (Ra0); b) after occlusal adjustment with diamond burs (Ra1); c) after polishing with the abrasive systems (Ra2); d) after polishing with felt disc and diamond paste (Ra3). Four additional samples were observed in scanning electron microscopy (SEM).Results:
According to the Generalized Estimating Equation followed by the Bonferroni test (α = 0.05), the CG provided the lowest Ra2 (0.63 µm), not differing significantly from the KO (0.78 µm). The highest Ra2 was obtained with the EV (0.97 µm), which did not differ significantly from the KO. There was no statistical difference in Ra between the polishing with the abrasive systems (Ra2) and the final polishing with diamond paste (Ra3). SEM images showed that the polishing systems did not completely remove the grooves caused by the diamond burs during the occlusal adjustment.Conclusion:
It was concluded that CG promoted smoother surface of the monolithic zirconia ceramic compared to EV, and intermediate smoothness was obtained with KO
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Propriedades de Superfície
/
Zircônio
/
Cerâmica
/
Polimento Dentário
Tipo de estudo:
Pesquisa qualitativa
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Pontifical Catholic University of Rio Grande do Sul/BR
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