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- Title
Staining of resin-based veneering materials with coffee and tea.
- Authors
Chung Moon Um; Ruyter, I. Eystein
- Abstract
Two light-activated, and three heat-polymerized, resin-based veneering materials were exposed to boiled coffee, filtered coffee, or tea at 50 °C and evaluated for color stability. Specimens immersed in distilled water in the dark at 37 °C for 4 months were also assessed. One of the light-activated, resin-based veneering materials underwent intrinsic discoloration during the long-term immersion both in distilled water and in the staining solutions. The discoloration of the other materials by tea was mainly due to surface adsorption of the colorants. Discoloration by coffee was due to adsorption, and also to absorption of colorants by two of the materials investigated. This absorption and penetration of colorants into the organic phase of the veneering materials were probably due to compatibility of the polymer phase with the yellow colorants of coffee.
- Publication
Quintessence International, 1991, Vol 22, Issue 5, p377
- ISSN
0033-6572
- Publication type
Academic Journal