title: Comparison of two intracanal irrigants' effect on flare-up in necrotic teeth.
abstract: BACKGROUND
  The aim of this study was to compare the efficacy of two irrigants on decreasing the pain and swelling at different times after treatment of necrotic pulp.
  
  
  METHODS
  Fifty patients with single canal tooth and necrotic pulp were selected and divided into two groups, twenty-five in each. Rotary files were used for preparing the canals and 0.2% chlorhexidine gluconate and 2.5% sodium hypochlorite were used for irrigation of canals. Then canals were filled by lateral condensation technique. A questionnaire was given to patients asking for the level of their pain and swelling. The patients were followed for 48h. Visual Analogue Scale (VAS) was used for determination of pain degree. The scale with 4 levels was used for measurement of the intensity of swelling. The data were statistically analyzed using Mann-Witney and Kruskal-Wallis tests.
  
  
  RESULTS
  The research showed no significant difference between irrigant solutions in decreasing the amount of pain and swelling after endodontic treatments. No significant relationship was detected between the incidence of pain with swelling, age, and sex. Flare-up in maxilla was more than mandible.
  
  
  CONCLUSIONS
  According to results of this in vivo study it was concluded that efficacies of 0.2% chlorhexidine gluconate and 2.5% NaOCl are the same.
authors.affiliation: Department of Endodontics, Dental School, Mashad University of Medical Sciences, Mashad, Iran.
authors.forename: Mina
authors.initials: M
authors.lastname: Zarei
authors.affiliation: Department of Endodontics, Dental School, Mashad University of Medical Sciences, Mashad, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Bidar
keywords: Chlorhexidine Gluconate; Flare-Up; Sodium Hypochlorite