IADR Abstract Archives
Discoloration Resistance Property of Variable Low-Viscosity Composite Resins
Objectives: Low-Viscosity composite resins are selected in many clinical cases because of their aesthetics, handling, and mechanical properties. Among Low-Viscosity composite resins, it is especially called “Injectable composite resin” that has high mechanical property and can be applied for tooth cusps. On the other hand, composite resin is known that discoloration is caused by color components in food, resulting in the aesthetics gets poor. In this study, the discoloration resistance property of variable injectable composite resins are investigated.
Methods: G-aenial Universal Injectable (GUI, GC corp.), OMNICHROMA flow (OCF, Tokuyama Dental corp.), Filtek Supreme Ultra (FSU, 3M), Estelite Universal Flow medium (EUF, Tokuyama Dental corp.) were evaluated in this study. Test specimens were prepared by filling each material in a mold (φ10 mm X 1 mm height) and light-cured by G-light Prima II Plus (GC corp.). They were immersed in red wine and stored at 37 degree C for 1 week. The color of each specimen in before and after the immersion were measured with spectrophotometer (NIPPON DENSHOKU), and color change (ΔEa*b*) was calculated (n=5). The results were statistically analyzed by Tukey-Kramer test.
Results: Each ΔEa*b* average was GUI 2.7, OCF 16.8, FSU 10.3 and EUF 7.8 respectively, and they showed significant difference in each other as shown in Table1 (p<0.05). In visual inspection, GUI was apparently seen the less discoloration compared to the others. This result reflected previous study which summarized that the color appearances are the almost same if ΔEa*b* is 2.7 or less1). In general, it is said that the color resistance property of composite resin is associated by main monomer components. Among tested products, OCF, FSU, and EUF are mainly composed of monomers with hydrophilic functional groups, whereas GUI is composed of monomers with non-hydrophilic functional groups such as Bis-MEPP2). Therefore, it was considered that GUI achieved high discoloration resistance because of non-hydrophilic monomer composition.
1) J Esthet Restor Dent. 2019 Mar;31(2):103-112.
2) Safety Data Sheet OCF, FSU, EUF, GUI
Conclusions: GUI had the highest discoloration resistance property against red wine among tested products and can be expected to maintain the long-term aesthetics in intra-oral environment.
Methods: G-aenial Universal Injectable (GUI, GC corp.), OMNICHROMA flow (OCF, Tokuyama Dental corp.), Filtek Supreme Ultra (FSU, 3M), Estelite Universal Flow medium (EUF, Tokuyama Dental corp.) were evaluated in this study. Test specimens were prepared by filling each material in a mold (φ10 mm X 1 mm height) and light-cured by G-light Prima II Plus (GC corp.). They were immersed in red wine and stored at 37 degree C for 1 week. The color of each specimen in before and after the immersion were measured with spectrophotometer (NIPPON DENSHOKU), and color change (ΔEa*b*) was calculated (n=5). The results were statistically analyzed by Tukey-Kramer test.
Results: Each ΔEa*b* average was GUI 2.7, OCF 16.8, FSU 10.3 and EUF 7.8 respectively, and they showed significant difference in each other as shown in Table1 (p<0.05). In visual inspection, GUI was apparently seen the less discoloration compared to the others. This result reflected previous study which summarized that the color appearances are the almost same if ΔEa*b* is 2.7 or less1). In general, it is said that the color resistance property of composite resin is associated by main monomer components. Among tested products, OCF, FSU, and EUF are mainly composed of monomers with hydrophilic functional groups, whereas GUI is composed of monomers with non-hydrophilic functional groups such as Bis-MEPP2). Therefore, it was considered that GUI achieved high discoloration resistance because of non-hydrophilic monomer composition.
1) J Esthet Restor Dent. 2019 Mar;31(2):103-112.
2) Safety Data Sheet OCF, FSU, EUF, GUI
Conclusions: GUI had the highest discoloration resistance property against red wine among tested products and can be expected to maintain the long-term aesthetics in intra-oral environment.
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