title: Effect of mouthwash and accelerated aging on the color stability of esthetic restorative materials.
abstract: OBJECTIVE
  To evaluate the color stability of esthetic restorative materials after immersion in mouthwashes and accelerated aging.
  
  
  METHODS
  Compomers and resin-based composites (RBC) were measured at baseline and repeatedly after immersion in three kinds of mouthwash (Listerine, Peridex, Rembrandt Age Defying) for 24 hrs and 7 days, and after aging for 150 kJ/m2. Color was measured according to CIE L*a*b* color scale on a reflection spectrophotometer.
  
  
  RESULTS
  After immersion for 7 days, the mouthwash groups did not produce significantly higher color changes than the distilled water group, except with some mouthwashes used with Tetric-Ceram. After immersion for 7 days and aging for 150 kJ/m2, the mouthwash groups did not produce significantly higher color changes than the distilled water group. Aging in weathering chamber produced color change (deltaE*) of 1.1-3.9, which was mainly influenced by the material. With some exceptions, the color changes from immersion of the RBCs and compomers in mouthwashes were not perceptible (deltaE*<3.3).
authors.affiliation: Department of Dental Biomaterials, College of Dentistry, Seoul National University, Korea.
authors.forename: Y K
authors.initials: YK
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: El Zawahry
authors.forename: K M
authors.initials: KM
authors.lastname: Noaman
authors.forename: J M
authors.initials: JM
authors.lastname: Powers
mesh_terms: D000704:Analysis of Variance; D000891:Anti-Infective Agents, Local / Q000737:chemistry; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000737:chemistry; D003116:Color; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D004338:Drug Combinations; D004955:Esthetics, Dental; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D006861:Hydrogen Peroxide; D007101:Immersion; D008422:Materials Testing; D009067:Mouthwashes / Q000737:chemistry*; D009822:Oils, Volatile / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry; D013053:Spectrophotometry; D013223:Statistics as Topic; D013499:Surface Properties; D013729:Terpenes / Q000737:chemistry; D013997:Time Factors
chemical_list: C406265:Alert composite resin; D000891:Anti-Infective Agents, Local; D020770:Compomers; D003188:Composite Resins; D004338:Drug Combinations; C118368:F2000 cement; D005899:Glass Ionomer Cements; D009067:Mouthwashes; D009822:Oils, Volatile; C098977:Rembrandt Mouthwash; D012459:Salicylates; D013729:Terpenes; C121818:Tetric ceram; C057473:Listerine; D006861:Hydrogen Peroxide; C010882:chlorhexidine gluconate; D002710:Chlorhexidine