Color Stability and Roughness of New Glass Ionomer-Based Restorative Materials

Objectives: The aim of this study was to investigate the effect of various drinks on color stability and roughness of GIC based/containing restorative materials.
Methods: One-hundred-thirty specimens for each material (GC Equia, GCP Glass Fill, Ketac N100, Glasiosite) were prepared using a teflon ring (7 x 2 mm). After specimen preparations, baseline color measurements and surface roughness measurements were done using a spectrophotometer and surface profilometer, respectively. Specimens were immersed in four different solutions (n=15) (distilled water, cola, orange juice, and chocolate milk) during 28 days’ test period. The immersion medias renewed daily. Color and surface roughness measurements were repeated at 1-, 7-, and 28-day. The data were statistically analyzed (p < 0.05).
Results: After 28 days, the highest ΔE* value was calculated in GCP Glass Fill immersed in chocolate milk (10.54 ± 0.69). All the tested materials showed significantly higher Ra values compared to baseline scores after immersion in various beverages regardless of the immersion solutions used (p<0.05).
Conclusions: Cola and chocolate milk produced the greatest color change, whereas orange juice lead to greatest surface roughness increase. Glasiosite showed less color change and surface roughness compared to other restorative materials.