Difference in the color stability of direct and indirect resin composites
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...
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| Format: | Article |
| Language: | English |
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University of São Paulo
2011-04-01
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| Series: | Journal of Applied Oral Science |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000200012 |
| _version_ | 1828488780605030400 |
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| author | Yong-Keun Lee Bin Yu Ho-Nam Lim Jin Ik Lim |
| author_facet | Yong-Keun Lee Bin Yu Ho-Nam Lim Jin Ik Lim |
| author_sort | Yong-Keun Lee |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-11T10:13:51Z |
| format | Article |
| id | doaj.art-e97438d3aa364ffdb21890e0e2a50a9f |
| institution | Directory Open Access Journal |
| issn | 1678-7757 1678-7765 |
| language | English |
| last_indexed | 2024-12-11T10:13:51Z |
| publishDate | 2011-04-01 |
| publisher | University of São Paulo |
| record_format | Article |
| series | Journal of Applied Oral Science |
| spelling | doaj.art-e97438d3aa364ffdb21890e0e2a50a9f2022-12-22T01:11:40ZengUniversity of São PauloJournal of Applied Oral Science1678-77571678-77652011-04-0119215416010.1590/S1678-77572011000200012Difference in the color stability of direct and indirect resin compositesYong-Keun LeeBin YuHo-Nam LimJin Ik LimIndirect 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000200012ColorResin compositesDental resinsDental materialsDental prosthesis coloring |
| spellingShingle | Yong-Keun Lee Bin Yu Ho-Nam Lim Jin Ik Lim Difference in the color stability of direct and indirect resin composites Journal of Applied Oral Science Color Resin composites Dental resins Dental materials Dental prosthesis coloring |
| title | Difference in the color stability of direct and indirect resin composites |
| title_full | Difference in the color stability of direct and indirect resin composites |
| title_fullStr | Difference in the color stability of direct and indirect resin composites |
| title_full_unstemmed | Difference in the color stability of direct and indirect resin composites |
| title_short | Difference in the color stability of direct and indirect resin composites |
| title_sort | difference in the color stability of direct and indirect resin composites |
| topic | Color Resin composites Dental resins Dental materials Dental prosthesis coloring |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000200012 |
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