title: Effect of different polishing systems and drinks on the color stability of resin composite.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the color stability of resin composit using different finishing systems and drinks.
  
  
  METHODS
  Composit disks (5 mm diameter, 2 mm thickness) were prepared for each nanofilled composite using a brass mold. The specimens were divided into 5 finishing system groups Mylar strip (Mylar, DuPont, Wilmington, Del., USA), Soft Lex (3M(™) ESPE(™) St. Paul, MN, USA), Enhance (Dentsply-DeTrey GmbHD Konstanz, Germany), Hiluster (KerrHawe, Bioggio, Switzerland), Opti Disc (KerrHawe, Bioggio, Switzerland) and each group was divided into 10 subgroups (n = 10) and stored for 24 hours at 37°C in different drinks water coffee, coffee with sugar, tea, tea with sugar, diet coke, coke, light sour cherry juice or sour cherry juice. Color of all specimens was measured before and after exposure with a spectrophotometer using CIE L*a*b* relative, and color changes (ΔE*) were then calculated. The data were analyzed with a twoway analysis of variance (ANOVA), and mean values were compared by the Tukey HSD test (p = 0.05).
  
  
  RESULTS
  For the drinks, the lowest ΔE* values were observed in the water and highest ΔE* values were observed in sour cherry juice. When drinks with and without sugar were compared, all groups with sugar demonstrated a higher color difference than without sugar. For the different finishing systems, Mylar strip group demonstrated significantly highest color change; Enhance groups demonstrated significantly lowest color change.
  
  
  CONCLUSIONS
  Finishing treatments and storage solutions significantly affect the color stability of resin composite. The presence of sugar in drinks increased the color difference compared to drinks without composit.
  
  
  CONCLUSIONS
  Polishing techniques and drinking drinks with sugar may affect the color of esthetic restorations.
authors.affiliation: Research Assistant, Department of Restorative Dentistry, Hacettepe University School of Dentistry, Ankara, Turkey.
authors.forename: Asll
authors.initials: A
authors.lastname: Berber
authors.forename: Filiz Yalcin
authors.initials: FY
authors.lastname: Cakir
authors.forename: Meserret
authors.initials: M
authors.lastname: Baseren
authors.forename: Sevil
authors.initials: S
authors.lastname: Gurgan
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D001628:Beverages; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D002253:Carbonated Beverages; D003069:Coffee; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D018130:Diamond / Q000737:chemistry; D005638:Fruit; D006801:Humans; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000737:chemistry; D027861:Prunus; D017655:Silicon Compounds / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods; D013395:Sucrose; D013499:Surface Properties; D013662:Tea; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D017554:Carbon Compounds, Inorganic; D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; D011093:Polyethylene Terephthalates; D017655:Silicon Compounds; D013662:Tea; D014867:Water; C025539:Lavsan; D013395:Sucrose; D018130:Diamond; D000537:Aluminum Oxide; C022088:silicon carbide