Difference in the color stability of direct and indirect resin composites
J. appl. oral sci
; J. appl. oral sci;19(2): 154-160, May-Apr. 2011. ilus, tab
Article
em En
| LILACS
| ID: lil-586043
Biblioteca responsável:
BR1.1
ABSTRACT
Indirect resin composites are generally regarded to have better color stability than direct resin composites since they possess higher conversion degree. OBJECTIVE:
The present study aimed at comparing the changes in color (ΔE) and color coordinates (ΔL, Δa and Δb) of one direct (Estelite Sigma 16 shades) and 2 indirect resin composites (BelleGlass NG 16 shades; Sinfony 26 shades) after thermocycling. MATERIAL ANDMETHODS:
Resins were packed into a mold and light cured; post-curing was performed on indirect resins. Changes in color and color coordinates of 1-mm-thick specimens were determined after 5,000 cycles of thermocycling on a spectrophotometer.RESULTS:
ΔE values were in the range of 0.3 to 1.2 units for direct resins, and 0.3 to 1.5 units for indirect resins, which were clinically acceptable (ΔE<3.3). Based on t-test, ΔE values were not signifcantly different by the type of resins (p>0.05), while ΔL, Δa and Δb values were signifcantly different by the type of resins (p<0.05). For indirect resins, ΔE values were infuenced by the brand, shade group and shade designation based on three-way ANOVA (p<0.05).CONCLUSION:
Direct and indirect resin composites showed similar color stability after 5,000 cycles of thermocycling; however, their changes in the color coordinates were different.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Cor
/
Resinas Compostas
/
Metacrilatos
Idioma:
En
Revista:
J. appl. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
China
/
Coréia do Sul
País de publicação:
Brasil