title: A comparative assessment of the accuracy of electronic apex locator (Root ZX) in the presence of commonly used irrigating solutions.
abstract: OBJECTIVE
  This study aimed to evaluate the accuracy of Root ZX in determining working length in presence of normal saline, 0.2% chlorhexidine and 2.5% of sodium hypochlorite.
  
  
  METHODS
  Sixty extracted, single rooted, single canal human teeth were used. Teeth were decoronated at CEJ and actual canal length determined. Then working length measurements were obtained with Root ZX in presence of normal saline 0.9%, 0.2% chlorhexidine and 2.5% NaOCl. The working length obtained with Root ZX were compared with actual canal length and subjected to statistical analysis.
  
  
  RESULTS
  No statistical significant difference was found between actual canal length and Root ZX measurements in presence of normal saline and 0.2% chlorhexidine. Highly statistical difference was found between actual canal length and Root ZX measurements in presence of 2.5% of NaOCl, however all the measurements were within the clinically acceptable range of ±0.5mm.
  
  
  CONCLUSIONS
  The accuracy of EL measurement of Root ZX within±0.5 mm of AL was consistently high in the presence of 0.2% chlorhexidine, normal saline and 2.5% sodium hypochlorite.
  
  
  CONCLUSIONS
  This study signifies the efficacy of ROOT ZX (Third generation apex locator) as a dependable aid in endodontic working length. Key words:Electronic apex locator, working length, root ZX accuracy, intracanal irrigating solutions.
authors.affiliation: Assistant Professor of Endodontics and Co Ordinator Dental Clinics, RAK College of Dental Scineces, Ras al Khaimah, UAE.
authors.forename: Osama
authors.initials: O
authors.lastname: Khattak
authors.affiliation: Junior Instructor, RAK College of Dental Sciences, Ras al Khaimah, UAE.
authors.forename: Ebadullah
authors.initials: E
authors.lastname: Raidullah
authors.affiliation: Intern dentist, RAK College of Dental Sciences, Ras al Khaimah, UAE.
authors.forename: Maria L
authors.initials: ML
authors.lastname: Francis