Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)
- Volume 18 Issue 2
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- Pages.93-99
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- 2002
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- 2384-4353(pISSN)
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- 2384-4272(eISSN)
Color Stability of IPS Empress 2 Glass-Ceramic after Heat-Pressing and Heat-Treatments
열가압 및 열처리에 따른 IPS Empress 2 Glass-Ceramic의 색 안정성
- Song, Kie-Bum (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Lee, Sang-Kwon (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Kim, Yu-Ree (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Oh, Sang-Chun (Department of Prosthodontics, School of Dentistry, Wonkwang University)
- 송기범 (원광대학교 치과대학 치과보철학교실) ;
- 이상권 (원광대학교 치과대학 치과보철학교실) ;
- 김유리 (원광대학교 치과대학 치과보철학교실) ;
- 오상천 (원광대학교 치과대학 치과보철학교실)
- Published : 2002.06.30
Abstract
This study was performed to investigate the color stability of IPS Empress 2 glass-ceramic after heat-pressing and/or heat-treatments. Three types of IPS Empress 2 ingots (shade 100, 300, 500) were tested. For this study, three groups were prepared as follows: group 1 is as-received material, group 2 is heat-pressed material, and group 3 is fully heat -treated material. The color of the specimens was measured with a colorimeter. The data were statistically evaluated with one-way ANOVA and Scheffe's multiple test. The results obtained were as follows: 1. IPS Empress 2 glass-ceramic demonstrated less color stability according as the shade is lighter. Namely, the shade 500 showed the lowest color shifts and the shade 100 showed the greatest color shifts after heat-pressing and heat-treatments. 2. In the cases of shade 100 and 300, the changes of
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