Comparative in vitro assessment of color stability of hybrid esthetic restorative materials against various children′s beverages

Abstract

Purpose:The present study was aimed to evaluate and compare the color stability of two hybrid tooth-colored restorative materials, namely, resin-modified glass ionomer cement (GC Fuji II LC Capsules - GC Corporation, Tokyo, Japan) and giomer (Beautifil II - Shofu Inc, Kyoto, Japan) when subjected to immersion in various children's beverages.Materials and Methods:Standardized disc specimens were prepared using the test restorative materials. After preparation and rehydration of the specimens, baseline color evaluations were performed using spectrophotometer. The readings were recorded according to CIELAB color space. The experimental groups were further subdivided for immersion in orange juice, bournvita milk, and coke. Subsequent to immersion and pH cycling, new color evaluations were carried out after 1 week and 4 weeks for all the experimental groups. The mean color change values were calculated.Results:The obtained data was subjected to statistical analysis. The results indicated that giomer specimens exhibited less color change as compared to RMGIC specimens indicating better color stability. The maximum color changes were found with the use of coke for a period of 4 weeks.Conclusion:Amongst the two materials, giomer showed less color changes as compared to RMGIC indicating a better color stability.

Color stability and surface roughness of polished anterior restorative materials

“…The AOBD group was similar with control group which had significantly lower performance than the PD and LPM groups. It has been previously reported that glass ionomer cements lack color stability, which can be explained by the degradation of metal polyacrylate salts 11,12) . Hotwani et al 12) believed that the amount of resin and filler particles may affect the color stability.…”

“…It has been previously reported that glass ionomer cements lack color stability, which can be explained by the degradation of metal polyacrylate salts 11,12) . Hotwani et al 12) believed that the amount of resin and filler particles may affect the color stability. In the present study, although RMGIC showed the least color stability, it was observed that the polishing systems affected the color change.…”

“…In the present study, although RMGIC showed the least color stability, it was observed that the polishing systems affected the color change. Hotwani et al 12) reported the color stability of an RMGIC material after staining in three different beverages and upon pH cycling for a period of 4 weeks without using any polishing system. In the RMGIC group, they reported a significant increase in mean color change (7.41) after 4 weeks of immersion in orange juice 12) .…”

“…Hotwani et al 12) reported the color stability of an RMGIC material after staining in three different beverages and upon pH cycling for a period of 4 weeks without using any polishing system. In the RMGIC group, they reported a significant increase in mean color change (7.41) after 4 weeks of immersion in orange juice 12) . In the RMGIC control group of the present study, the ΔE* value was 9.65 and there was positive correlation between surface roughness and color changes in RMGIC group.…”

“…The water acts as a carrier for staining agents in the water sorption process 22) , and therefore stain adsorption tends to follow the evolution of water sorption, occurring primarily during the first week 23) . Some factors such as resin matrix, dimensions of filler particles, depth of polymerization, staining agents, and the pH values of the staining solution have also been reported to affect the discoloration of restorative materials 12,13) . The lower pH value of staining solutions has been reported to increase staining 13,24) , but the present study did not show an association between pH and color change.…”