title: Investigation of eluted monomers from resin-based root canal sealer by high-performance liquid chromatography analysis.
abstract: OBJECTIVE
  The purpose of the current study was to determine the amount of urethane dimethacrylate (UDMA), bisphenol A-glycidyl methacrylate (Bis-GMA), poly (ethylene glycol) dimethacrylate (PEGDMA), bisphenol A ethoxylated dimethacrylate (Bis-EMA), and 2-hydroxyethyl methacrylate (HEMA) eluted from resin-based root canal sealer, epiphany, using high-performance liquid chromatography (HPLC).
  
  
  METHODS
  Epiphany was placed into the plastic molds and light-cured with a light emitting diode. After the curing process, each specimen in the first group (n = 12) was immersed in Eppendorf tubes containing a phosphate-buffered saline solution (PBS) and incubated for 45 s. In the second group, each specimen (n = 12) was immersed in Eppendorf tubes containing PBS and incubated for 24 h. Of the specimen extracts, 100 μL were subjected to HPLC. Analysis of data was accomplished with one-way analysis of variance (P < 0.05).
  
  
  RESULTS
  All of the samples eluted HEMA, UDMA, Bis-GMA, PEGDMA, and Bis-EMA. A significant difference was determined between the time periods of HEMA, UDMA, PEGDMA, and Bis-EMA (P < 0.05).
  
  
  CONCLUSIONS
  The results of the current study showed that Epiphany releases HEMA, UDMA, Bis-GMA, PEGDMA, and Bis-EMA in both time periods.
authors.affiliation: Department of Restorative and Dentistry, Faculty of Dentistry, Gazi University, Ankara, Turkiye.
authors.forename: Huma
authors.initials: H
authors.lastname: Omurlu
authors.affiliation: Department of Restorative and Dentistry, Faculty of Dentistry, Gazi University, Ankara, Turkiye.
authors.forename: Hacer Deniz
authors.initials: HD
authors.lastname: Arisu
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Yeni Yüzyıl University, İstanbul, Turkiye.
authors.forename: Evrim Eliguzeloglu
authors.initials: EE
authors.lastname: Dalkilic
authors.affiliation: Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkiye.
authors.forename: Ugur
authors.initials: U
authors.lastname: Tamer
authors.affiliation: Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkiye.
authors.forename: Hilal
authors.initials: H
authors.lastname: Torul
keywords: High-performance liquid chromatography; monomer; resin; sealer