Difference in the color stability of direct and indirect resin composites
J. appl. oral sci
; 19(2): 154-160, May-Apr. 2011. ilus, tab
Article
en En
| LILACS
| ID: lil-586043
Biblioteca responsable:
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.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
LILACS
Asunto principal:
Color
/
Resinas Compuestas
/
Metacrilatos
Idioma:
En
Revista:
J. appl. oral sci
Asunto de la revista:
ODONTOLOGIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
China
/
Corea del Sur