SciELO - Scientific Electronic Library Online

vol.19 issue2In vitro dentin permeability after application of Gluma® desensitizer as aqueous solution or aqueous fumed silica dispersionBreastfeeding and non-nutritive sucking patterns related to the prevalence of anterior open bite in primary dentition author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of Applied Oral Science

Print version ISSN 1678-7757


LEE, Yong-Keun; YU, Bin; LIM, Ho-Nam  and  LIM, Jin Ik. Difference in the color stability of direct and indirect resin composites. J. Appl. Oral Sci. [online]. 2011, vol.19, n.2, pp.154-160. ISSN 1678-7757.

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 AND METHODS: 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.

Keywords : Color; Resin composites; Dental resins; Dental materials; Dental prosthesis coloring.

        · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License