title: Effect of different final irrigants on bond strength of resilon/epiphany and resilon/epiphany self-etch.
abstract: OBJECTIVE
  To assess the effects of different final irrigants on the bond strength of bonded root filling materials, Epiphany/Resilon and Epiphany self-etch (SE)/Resilon.
  
  
  METHODS
  The root canals of eighty single-rooted extracted human teeth were prepared. After the smear layer was removed using 17% EDTA, the samples were randomly divided into eight groups. In groups 1 and 2, no additional irrigant was used after EDTA. In the other groups, final irrigation was performed with 2.5% NaOCl (groups 3 and 4), 2% chlorhexidine (CHX) (groups 5 and 6), and normal saline (groups 7 and 8). The root canals were obturated with Epiphany/Resilon in groups 1, 3, 5 and 7 and obturated with Epiphany SE/Resilon in groups 2, 4, 6 and 8. After the middle thirds of the roots were horizontally sectioned, the push-out bond strength of root filling materials was assessed using the universal testing machine. The data were analyzed using Mann-Whitney and Kruskal-Wallis tests. The significance level was set at p<0.05.
  
  
  RESULTS
  There was no significant difference between the push-out bond strength of Epiphany/Resilon and Epiphany SE/Resilon (p>0.05). Considering the irrigation protocols, final irrigation with 2.5% NaOCl was associated with a significantly lower bond strength of both filling materials than the other irrigants (p<0.05). EDTA, CHX and normal saline had similar effects on the bond strengths of filling materials (p>0.05).
  
  
  CONCLUSIONS
  Final irrigation of the root canals with 2.5% NaOCl following application of EDTA had a negative effect on the bond strength of Epiphany and Epiphany SE obturation systems.
authors.affiliation: Associate Professor, Dental Research Center, Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran ; Laser Research Center of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Noushin
authors.initials: N
authors.lastname: Shokouhinejad
authors.affiliation: Postgraduate Student, Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Naghmeh
authors.initials: N
authors.lastname: Meraji
authors.affiliation: Assistant Professor, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Ahmad Reza
authors.initials: AR
authors.lastname: Shamshiri
authors.affiliation: Assistant Professor, Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mehrfam
authors.initials: M
authors.lastname: Khoshkhounejad
authors.affiliation: Assistant Professor, Oral and Dental Diseases Research Center/Department of Endodontics, Kerman University of Medical Sciences, Kerman, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Raoof
keywords: Chlorhexidine; Epiphany Sealer; Sodium hypochlorite