title: Surface roughness of flowable resin composites eroded by acidic and alcoholic drinks.
abstract: OBJECTIVE
  The aim of this study is to evaluate the surface roughness of four flowable resin composites following exposure to acidic and alcoholic drinks.
  
  
  METHODS
  SureFil SDR flow, TetricEvoFlow, Esthet-X Flow and Amaris Flow HT samples were immersed in artificial saliva, Coca Cola and Chivas Regal Whisky. Each specimen was examined using a Leica DCM 3D microscope: Arithmetical mean height of the surface profiles was measured (Sa).
  
  
  RESULTS
  Kruskal-Wallis test showed significant differences among various groups (P<0,001). Mann Whitney test was applied and control groups showed significantly lower Sa values than other groups (P=0,008). Coca Cola groups showed highest Sa values (P<0,021). No significant differences (P=0,14) in surface texture were found among the specimens of the different materials. No significant differences were found among TetricEvoFlow, Esthet-X Flow and Amaris Flow under control conditions nor after Coca Cola application. Under control condition and after Coca Cola application SureFil SDR flow showed significantly higher Sa values. Moreover, after whisky application Amaris Flow showed significantly lower Sa values then the other three groups that showed no significant differences among them.
  
  
  CONCLUSIONS
  Acidic and alcoholic drinks eroded the surface roughness of all evaluated flowable resin composites.
authors.affiliation: Department of Operative Dentistry, University of Pavia, Piazzale Golgi 3, 27100 Pavia, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Poggio
authors.forename: Alberto
authors.initials: A
authors.lastname: Dagna
authors.forename: Marco
authors.initials: M
authors.lastname: Chiesa
authors.forename: Marco
authors.initials: M
authors.lastname: Colombo
authors.forename: Andrea
authors.initials: A
authors.lastname: Scribante