IADR Abstract Archives
Characterization of composite resin with GIOMER technology
Objectives: GIOMERS are resin-based materials containing pre-reacted glass-ionomer particles, and they could undergo degradation overtime. The objective was to verify, in vitro, different properties using different colors of a GIOMER composite.
Methods: Composite resin specimens were prepared (15.0 diameter x 1.0 mm thick). 50 specimens of GIOMER resin (shades A1, A2, B1, B3, C3) were prepared for sorption and solubility and for flexural strength. Sorption/solubility test was performed according to ISO 4049:2009 For flexural strength test, specimens were submitted to three-point bending flexural test using a universal test machine until fracture. Flexural strength was calculated in MPa. For color evaluation, 60 specimens were prepared (n=5) using A2, B2 and C2 resins. The specimens were photographed 07 days after the preparation and immersed in dye solutions (distilled water-control-, tomato sauce, Coca-Cola or açaí paste). Cycles consisted of 3x/day, immersion for 20 minutes each, simulating the oral environment. Specimens were rinsed and stored in distilled water. The solutions were renewed daily up to 14 days. On days 4 and 14, pictures were taken using a mobile device. The shade of specimens was analyzed using the color space International Commission on Illumination.
Results: For sorption and solubility (p=0.608) and flexural strength (p=0.249), there was no statistically significant difference between groups. Color analysis showed that the control group produced great color change in 7 and 14 days for A2 shade (p <0.05). Shade B2, in 14 days, presented greater color change for the samples immersed in tomato sauce (p <0.05) without statistical difference of the control. After 7 days, shade C2 in Coca-Cola group and A2 in control group showed great color change (p <0.05).
Conclusions: Sorption/solubility and flexural strength of GIOMER resin were stable. However, there was a significant interaction between hue and immersion solutions.
Methods: Composite resin specimens were prepared (15.0 diameter x 1.0 mm thick). 50 specimens of GIOMER resin (shades A1, A2, B1, B3, C3) were prepared for sorption and solubility and for flexural strength. Sorption/solubility test was performed according to ISO 4049:2009 For flexural strength test, specimens were submitted to three-point bending flexural test using a universal test machine until fracture. Flexural strength was calculated in MPa. For color evaluation, 60 specimens were prepared (n=5) using A2, B2 and C2 resins. The specimens were photographed 07 days after the preparation and immersed in dye solutions (distilled water-control-, tomato sauce, Coca-Cola or açaí paste). Cycles consisted of 3x/day, immersion for 20 minutes each, simulating the oral environment. Specimens were rinsed and stored in distilled water. The solutions were renewed daily up to 14 days. On days 4 and 14, pictures were taken using a mobile device. The shade of specimens was analyzed using the color space International Commission on Illumination.
Results: For sorption and solubility (p=0.608) and flexural strength (p=0.249), there was no statistically significant difference between groups. Color analysis showed that the control group produced great color change in 7 and 14 days for A2 shade (p <0.05). Shade B2, in 14 days, presented greater color change for the samples immersed in tomato sauce (p <0.05) without statistical difference of the control. After 7 days, shade C2 in Coca-Cola group and A2 in control group showed great color change (p <0.05).
Conclusions: Sorption/solubility and flexural strength of GIOMER resin were stable. However, there was a significant interaction between hue and immersion solutions.