title: Comparison of accuracy of two electronic apex locators in the presence of various irrigants: An in vitro study.
abstract: OBJECTIVE
  This study was designed to compare the accuracy of Root ZX and SybronEndo Mini, electronic apex locators (EALs), in the presence of various irrigants.
  
  
  METHODS
  Sixty extracted, single-rooted human teeth were decoronated and the root canals coronally flared. The actual length (AL) was assessed visually and teeth mounted in the gelatin model. The electronic length (EL) measurements were recorded with both EALs in the presence of 0.9% saline; 1% sodium hypochlorite (NaOCl); 2% chlorhexidine digluconate (CHX), and 17% EDTA solution, at "0.5" reading on display. The differences between the EL and AL were compared.
  
  
  RESULTS
  The accuracy of EL measurement of Root ZX and Sybron Mini within±0.5 mm of AL was consistently high in the presence of NaOCl and found to be least with EDTA.
  
  
  CONCLUSIONS
  EL measurements were shorter with 1% NaOCl, whereas longer with 2% CHX for both the devices. Sybron Mini was more accurate with 1% NaOCl and 2% CHX than Root ZX.
authors.affiliation: Department of Conservative Dentistry and Endodontics, JSS Dental College and Hospital, A Constituent College of JSS University, Sri Shivarathreeshwara Nagar, Mysore, Karnataka, India.
authors.forename: J Paras
authors.initials: JP
authors.lastname: Mull
authors.forename: Vinutha
authors.initials: V
authors.lastname: Manjunath
authors.forename: Mk
authors.initials: M
authors.lastname: Manjunath