title: Surface roughness and erosion of nanohybrid and nanofilled resin composites after immersion in red and white wine.
abstract: OBJECTIVE
  This study aimed to investigate the effects of red and white wine on the surface roughness and erosion of nanohybrid and nanofilled resin composites.
  
  
  METHODS
  Sixty specimens of each resin-based composite (RBC) were prepared. Before immersion, baseline data roughness values were recorded using a profilometer. Three groups of discs (n = 20) were then alternately immersed in red wine, white wine, and deionized water (as a control) for 25 min and artificial saliva for 5 min over four cycles. The specimens were then stored in artificial saliva for 22 h. This process was repeated for 5 days following immersion in artificial saliva for 2 days. Subsequently, the process was repeated. After immersion, the specimens were evaluated and data were analyzed by two-way repeated analysis of variance (ANOVA) and Tukey's honestly significant difference (HSD) (α = 0.05).
  
  
  RESULTS
  Red wine caused significantly greater roughness and erosion than did white wine and deionized water (P < 0.05). Nanohybrid resin composites were significantly rougher than nanofilled resin composites (P < 0.05).
  
  
  CONCLUSIONS
  The effects of red and white wine on the surface roughness and erosion 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 and Dental Materials Research Unit, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
authors.forename: Saijai
authors.initials: S
authors.lastname: Tantanuch
authors.affiliation: Department of Conservative Dentistry and 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: Erosion; resin composite; roughness; wine