title: Influence of different staining beverages on color stability, surface roughness and microhardness of silorane and methacrylate-based composite resins.
abstract: OBJECTIVE
  To investigate the influence of different staining beverages on color stability, surface roughness and microhardness of silorane and methacrylate-based composite resins.
  
  
  METHODS
  Three different composite resins (Filtek Silorane, Filtek P60, Filtek Supreme XT) were tested. Thirty cylindrical specimens (10 × 2 mm) per material were prepared and polished with a series of aluminum-oxide polishing disks. Each group was then randomly subdivided into three groups according to the test beverages: distilled water (control), cola and coffee. The samples were immersed into different beverages for 15 days. Color, surface roughness and microhardness values were measured by a spectrophotometer, prophylometer and Vickers hardness device respectively, at baseline and after 15 days. The data were subjected to statistical analysis.
  
  
  RESULTS
  Immersion in coffee resulted in a significant discoloration for all the composites tested, although the color change was lower in Filtek Silorane than that of MBCs (p < 0.05). All the composites tested showed similar surface roughness changes after immersion in different beverages (p > 0.05). Besides coffee caused more roughness change than others. Immersion in coffee caused highest microhardness change in Filtek Supreme XT (p < 0.05).
  
  
  CONCLUSIONS
  Cola and coffee altered, to some degree, the color, surface roughness and/or microhardness of the tested resin composites, depending on the characteristics of the materials.
authors.affiliation: Assistant Professor, Department of Restorative Dentistry, Ondokuz Mayis University, Faculty of Dentistry, Turkey, e-mail: dtemelkaraman@gmail.com.
authors.forename: Emel
authors.initials: E
authors.lastname: Karaman
authors.affiliation: Assistant Professor, Department of Restorative Dentistry, Başkent University Faculty of Dentistry, Turkey.
authors.forename: Duygu
authors.initials: D
authors.lastname: Tuncer
authors.affiliation: Assistant Professor, Department of Restorative Dentistry, Hacettepe University Faculty of Dentistry, Turkey.
authors.forename: Esra
authors.initials: E
authors.lastname: Firat
authors.affiliation: Doctor, Department of Prosthodontics, Ondokuz Mayis University Faculty of Dentistry, Turkey.
authors.forename: Oguz Suleyman
authors.initials: OS
authors.lastname: Ozdemir
authors.affiliation: Assistant Professor, Department of Biostatistics, Hacettepe University, School of Medicine, Turkey.
authors.forename: Sevilay
authors.initials: S
authors.lastname: Karahan
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D001628:Beverages; D002253:Carbonated Beverages; D003069:Coffee; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D062047:Silorane Resins / Q000737:chemistry*; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D003069:Coffee; D003188:Composite Resins; C438835:Filtek P60 Composite Resin; C474035:Filtek Supreme; D008689:Methacrylates; D062047:Silorane Resins; C555513:silorane composite resin; D014867:Water; D000537:Aluminum Oxide