Effect of hydrogen peroxide application on color and surface roughness of two restorative materials
Braz. j. oral sci
; 15(3)July-Sept. 2016. tab
Article
em En
| LILACS, BBO
| ID: biblio-875034
Biblioteca responsável:
BR218.1
ABSTRACT
Aim:
This study investigated the effect of an in-office bleaching technique on lightness, color and surface roughness of two commercially available materials a resin-modified glass-ionomer cement and a nanohybrid resin composite.Methods:
Twelve disk-shaped specimens were prepared with both materials. The samples were bleached with 35% hydrogen peroxide. Bleaching was tested initially onto a smooth surface and later onto a polished one of the same specimens. The effect of the treatments on lightness and color was verified with a spectrophotometer. Surface roughness was measured with a digital surface roughness tester. The data were statistically analyzed by repeated measures ANOVA and post hoc Tukey's test (alpha = 0.05).Results:
Significant variation in lightness and color was observed on the resin-modified glass-ionomer cement after the first bleaching procedure. Roughness increased significantly only after polishing the resin-modified glass-ionomer cement surface. Composite color variation was evident in the last observation period, but roughness and lightness variation due to bleaching and polishing was not significant.Conclusion:
The bleaching treatment caused significant color alterations on the materials tested. This study observed that the application of in-office bleaching onto the glass-ionomer cement promoted clinically observable color alteration, and polishing after bleaching is contraindicated for this material. (AU)Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
BBO
/
LILACS
Assunto principal:
Resinas Compostas
/
Cimentos de Ionômeros de Vidro
/
Peróxido de Hidrogênio
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil