title: Effects of different intra canal medicaments on the push out bond strength of endodontic sealers.
abstract: BACKGROUND
  One of the essential properties of the root canal sealers is the adhesion to root canal dentin and their higher bond strength decreases the microleakage. The aim of the present study was to compare the effect of Different Intracanal medicaments on the push out bond strength of AH26 and MTA Fillapex sealers.
  
  
  METHODS
  A total of 104 one-rooted extracted human teeth were divided into 4 (n=26) experimental groups. After the cleaning and shaping, the root canals were filled with Ca(OH)2, triantibiotic paste (TAP), Metapex or 2% chlorhexidine gel for two weeks. Then, intracanal medicaments were rinsed away and the samples in the sub-groups were obturated with gutta-percha and AH26 or MTA Fillapex sealers. After two weeks incubation, 2-mm-thick middle section of each root was then subjected to push-out testing. Data were analyzed with two-way ANOVA and LSD test.
  
  
  RESULTS
  With all the intracanal medicaments, the overall mean of bond strength values were significantly higher with AH26 compared to MTA Fillapex (p<0.05). With the use of MTA Fillapex the maximum and minimum means of bond strength values were recorded with CHX and Metapex and for AH26 were recorded with Ca(OH)2 and chlorhexidine, respectively.
  
  
  CONCLUSIONS
  The bond strengths of sealers to dentin are under the influence of pre-treatment with intracanal medicaments. Under the limitations of the present study, the effect of TAP on the bond strength of endodontic sealers was not negative.Key words:AH26, medicament, MTA Fillapex, push-out bond.
authors.affiliation: Associate Professor, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Sahar
authors.initials: S
authors.lastname: Shakouie
authors.affiliation: Professor, Dental and Periodontal Research Center, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahi
authors.affiliation: Associate Professor, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Samiei
authors.affiliation: Assistant Professor, Dental and Periodontal Research Center, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Amin-Salem
authors.initials: AS
authors.lastname: Milani
authors.affiliation: Associate Professor, Dental and Periodontal Research Center, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Mohammad-Frough
authors.initials: MF
authors.lastname: Reyhani
authors.affiliation: Assistant Professor, Department of Endodontics, Dental Faculty, Ardabil University (Medical Sciences), Ardabil, Iran.
authors.forename: Sara
authors.initials: S
authors.lastname: Paksefat
authors.affiliation: Assistant Professor, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Mahsa
authors.initials: M
authors.lastname: Eskandarinekhad
authors.affiliation: Assistant Professor, Dental and Periodontal Research Center, Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Negin
authors.initials: N
authors.lastname: Ghasemi