title: Effects of Chlorhexidine and Sodium Hypochlorite on the Setting Time of Calcium-Enriched Mixture Cement.
abstract: BACKGROUND
  The aim of the present study was to evaluate whether adding 2% chlorhexidine (CHX) and 2.6% sodium hypochlorite (NaOCl) to calcium-enriched mixture (CEM) cement would affect its setting time (ST), or not.
  
  
  METHODS
  In this study, the setting time of CEM cement was evaluated in three groups (n=9) as follows: group 1; CEM cement, group 2; CEM cement+2% CHX and group 3; CEM cement+2.6% NaOCl. Then the mean values of ST were calculated and the Kolmogorov-Smirnov test was used to evaluate the normal distribution of data. The Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. Statistical significance was set at 0.05.
  
  
  RESULTS
  The mean ST for groups 1, 2 and 3 were 105, 120 and 220 min, respectively. There was a significant increase in the duration of ST in group 3 (NaOCl) in comparison with the two other groups (P<0.05).
  
  
  CONCLUSIONS
  NaOCl significantly increased the ST of CEM cement, whereas chlorhexidine did not alter the ST.
authors.affiliation: Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Mohammad
authors.initials: M
authors.lastname: Frough Reyhani
authors.affiliation: Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Negin
authors.initials: N
authors.lastname: Ghasemi
authors.affiliation: Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Sahar
authors.initials: S
authors.lastname: Shakouie
authors.affiliation: Dental and Periodontal Research Center, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahimi
authors.affiliation: Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran;
authors.forename: Amin
authors.initials: A
authors.lastname: Salem Milani
authors.affiliation: Private Practice, Tabriz, Iran.
authors.forename: Babak
authors.initials: B
authors.lastname: Ranjbar
keywords: CEM Cement; Calcium-Enriched Mixture; Chlorhexidine; Setting Time; Sodium Hypochlorite