두께에 따른 GI Cement의 색상 변화 및 각 Shade 내의 색상 변화 추이도 = COLOT CHANGE WITH CEMENT THICKNESS AND COLOR SHIFT PATTERN OF EACH SHADE ERIES IN GI CEMENT

다국어 초록 (Multilingual Abstract)

Glass ionomer cements, which had been developed in 1972, were widely used as an agent for cementation, base, pit and fissure sealant, and esthetic filling material with the advantages of excellent biocompatibility, anti-cariogenic fluoride release.
Specimens were made to evaluate toe color change of Glass ionomer cement with a newly developed improved Fuji Ⅱ LC. Specimens for color change study with cement thickness of 1, 2, 3mm were made and those for the study of color shift pattern were made with the assumption that new mid-shade can be made by mixing of equal amount of both shades in 2mm thickness.
After 24 hours in a 37℃ incubator, CIELAB color space were evaluated with a spectrophotometer.
The results were as follows;
1. All specimens discolored to dark and blue with an increased thickness in all shades(p<0.05).
2. There were significant a* space(red-green direction) changes in every A, B, C, D shade series except the erlationship between 1mm and 2mm thickness groups in B shade series. But the changes were irregular, e.e., each shade series has its own pattern.
3. Each shade series showed its own specific color shift pattern in all L*, a*, b* spaces.
4. B shade series showed less amont of changes in Δ±E than those of A and C shade series(p<0.05), but there was no significant difference in ΔE within each shade series.