title: Elution of residual monomers from dental composite materials.
abstract: OBJECTIVE
  This study was designed to determine the type and amount of the monomers leached from the different particle sizes of the composite materials.
  
  
  METHODS
  Three different disk sizes (2, 4, 6 mm) prepared for each material group (Filtek Flow, Filtek A110, Filtek P60 and Filtek Supreme) were polymerised by LED and halogen light; the specimens were then placed in artificial saliva. The monomer release in 30 min and 24 hrs from the specimens was analyzed in HPLC calibrated for the monomer extracts before.
  
  
  RESULTS
  TEGDMA release was detected in all material groups after 30 min and after 24 hrs. BisGMA and BisEMA were not determined in any groups and UDMA was detected only in Filtek Supreme. Significant differences in release of TEGDMA and UDMA were obtained between the different sizes of discs. Significantly high amount of TEGDMA and UDMA monomer release was obtained in LED than Halogen groups. Lower amount of monomer release was obtained in species of 30 min than 24 hrs.
  
  
  CONCLUSIONS
  Data has revealed that the monomer release could be detected significantly high from the composite materials polymerized by a lower output curing light device; and higher elution of monomers was determined as the composite thickness has increased. Therefore, the clinical applications of composite materials and the type of curing units have very important effects on the success of restorations and in the decrease of potential side effects.
authors.affiliation: Istanbul University, Faculty of Dentistry, Dept of Pedodontics, Istanbul, Turkey. ebtuna@istanbul.edu.tr
authors.forename: E B
authors.initials: EB
authors.lastname: Tuna
authors.forename: O
authors.initials: O
authors.lastname: Aktoren
authors.forename: Y
authors.initials: Y
authors.lastname: Oshida
authors.forename: K
authors.initials: K
authors.lastname: Gencay
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D003188:Composite Resins / Q000737:chemistry*; D055117:Curing Lights, Dental; D055115:Light-Curing of Dental Adhesives; D008689:Methacrylates / Q000032:analysis*; D010316:Particle Size; D011092:Polyethylene Glycols / Q000032:analysis; D058105:Polymerization; D011109:Polymethacrylic Acids / Q000032:analysis; D011140:Polyurethanes / Q000032:analysis; D012464:Saliva, Artificial; D012666:Semiconductors
chemical_list: D003188:Composite Resins; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D012464:Saliva, Artificial; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; C041979:2,2-bis-(4-(2-methacryloxyethoxy)phenyl)propane; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate