Staining of resin-based veneering materials with coffee and tea.
Two light-activated, and three heat-polymerized, resin-based veneering materials were exposed to boiled coffee, filtered coffee, or tea at 50 degrees C and evaluated for color stability. Specimens immersed in distilled water in the dark at 37 degrees 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.
Seoul National University, Korea.
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D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D003069:Coffee / Q000009:adverse effects*; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D003801:Dental Veneers; D008689:Methacrylates; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements; D012821:Silanes; D013053:Spectrophotometry; D013662:Tea / Q000009:adverse effects*; D014099:Toothbrushing
D000180:Acrylic Resins; D003069:Coffee; C029012:Composite Dental Resin; D003188:Composite Resins; D008689:Methacrylates; D011140:Polyurethanes; D019279:Resin Cements; D012821:Silanes; D013662:Tea; D003776:Dental Porcelain; C058237:Biodent; C057365:Dentacolor