title: The effect of red and white wine on color changes of nanofilled and nanohybrid resin composites.
abstract: OBJECTIVE
  This study investigated the effect of red and white wine on color changes of nanofilled and nanohybrid resin composite.
  
  
  METHODS
  Sixty specimens of each resin composite were prepared. Baseline data color values were recorded using a spectrophotometer. Three groups of discs (n = 20) were then alternately immersed in red, white wine, and deionized water (as a control) for twenty five minutes and artificial saliva for five minutes for four cycles. Specimens were then stored in artificial saliva for twenty two hours. This process was repeated for five days following immersion in artificial saliva for two days. Subsequently, the process was repeated again. Data were analyzed by two-way repeated ANOVA, one-way ANOVA, and Tukey's HSD.
  
  
  RESULTS
  Red wine caused significantly higher color change (ΔE(*) > 3.3) than did white wine and deionized water (p < 0.05). Nanohybrid resin composites had significantly more color changes than nanofilled resin composite (p < 0.05).
  
  
  CONCLUSIONS
  The effect of red and white wine on the color changes of resin composite restorative materials depended upon the physical and chemical composition of the restorative materials and the types of wine.
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.; Dental Materials Research Unit, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Saijai
authors.initials: S
authors.lastname: Tanthanuch
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.; Dental Materials Research Unit, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Boonlert
authors.initials: B
authors.lastname: Kukiattrakoon
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Thanwalee
authors.initials: T
authors.lastname: Peerasukprasert
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Nilobon
authors.initials: N
authors.lastname: Chanmanee
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Parnchanok
authors.initials: P
authors.lastname: Chaisomboonphun
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Apisara
authors.initials: A
authors.lastname: Rodklai
keywords: Resin composite; Stainability; Wine