title: Accuracy of electronic apex locator in enlarged root canals with different root canal irrigants: an in vitro study.
abstract: OBJECTIVE
  To evaluate the accuracy of Root ZX-II (J Morita Corp) apex locator in enlarged root canals with different root canal irrigants.
  
  
  METHODS
  48 freshly extracted single rooted mandibular premolar teeth were used. The apical enlargement was done up to #45 K-file as the master apical file (MAF). The teeth were randomly divided into 4 groups and mounted in an experimental apparatus. The following irrigants were used during electronic canal measurements: group 1: saline; group 2: 3% NaOCl; group 3: 2% chlorhexidine; group 4: 17% EDTA. The canal measurement was done with Root ZX-II apex locator using #10 and #45 K-file. Data were analyzed by two way ANOVA and Bonferroni multiple comparison test.
  
  
  RESULTS
  Statistical analysis showed that there was statistically significant difference between #10 and #45 K-file for group 1 (p < 0.01).
  
  
  CONCLUSIONS
  Root ZX-II was accurate in the presence of 3% NaOCl and 17% EDTA when measured with smaller and larger files. However, it was accurate in the presence of saline and 2% CHX when larger files were used.
authors.affiliation: Senior Lecturer, Department of Conservative Dentistry and Endodontics, SVS Institute of Dental Sciences, Mahabubnagar, Andhra Pradesh, India, Phone: 91-8542-271515, Fax: 91-8542-273111, e-mail: sainathreddy47@gmail.com.
authors.forename: Sainath
authors.initials: S
authors.lastname: Dinapadu
authors.forename: Srikanth
authors.initials: S
authors.lastname: Pasari
authors.forename: Shilpa Reddy
authors.initials: SR
authors.lastname: Admala
authors.forename: Narender Reddy
authors.initials: NR
authors.lastname: Marukala
authors.forename: Sindhurareddy
authors.initials: S
authors.lastname: Gurram
authors.forename: Ravigna
authors.initials: R
authors.lastname: Peddi
mesh_terms: D001641:Bicuspid / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D002710:Chlorhexidine / Q000627:therapeutic use; D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D004492:Edetic Acid / Q000627:therapeutic use; D055615:Electrical Equipment and Supplies / Q000706:statistics & numerical data; D004867:Equipment Design; D006801:Humans; D009811:Odontometry / Q000295:instrumentation* / Q000706:statistics & numerical data; D019252:Radiography, Dental, Digital; D012388:Root Canal Irrigants / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000706:statistics & numerical data; D012965:Sodium Chloride / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D019227:Tooth Apex / Q000033:anatomy & histology* / Q000000981:diagnostic imaging
chemical_list: D012388:Root Canal Irrigants; D012965:Sodium Chloride; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D002710:Chlorhexidine