European Archives of Paediatric Dentistry

, Volume 15, Issue 1, pp 51–54 | Cite as

Evaluation of the multifrequency electronic apex locator Joypex 5 in primary teeth

  • E. J. N. L. SilvaEmail author
  • D. R. Herrera
  • E. J. Souza-Júnior
  • T. P. Rosa
Original Scientific Article



To evaluate ex vivo the accuracy of the multifrequency electronic apex locator (EAL) Joypex 5 in primary molars.


Fourteen primary molars were selected for a total of 25 root canals. Working length measurements were performed by direct observation (DO), using a 15 K-file into the root canal until its tip was visible at the apical foramen and electronically using the EALs Joypex 5. Data were analysed statistically using the intraclass correlation coefficient (ICC). To assess whether a significant difference in accuracy of the electronic apex locator existed, the Student’s t test was performed at 5 % significance.


No statistical difference was observed between the direct observation and the EAL measurement (p < 0.05). The ICC confirmed the agreement of different methods to measure canal length. The R 2 coefficient was close to 1, denoting a strong agreement between measures obtained with Joypex 5 and DO.


The multifrequency EALs Joypex 5 showed adequate accuracy in the root length determination of primary teeth.


Endodontics Electronic apex locator Primary teeth 


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Copyright information

© European Academy of Paediatric Dentistry 2013

Authors and Affiliations

  • E. J. N. L. Silva
    • 1
    • 3
    Email author
  • D. R. Herrera
    • 2
  • E. J. Souza-Júnior
    • 2
  • T. P. Rosa
    • 2
  1. 1.Endodontics DepartmentGrande Rio University-UNIGRANRIORio de JaneiroBrazil
  2. 2.Endodontics Department, Piracicaba Dentistry SchoolCampinas State University-UNICAMPCampinasBrazil
  3. 3.NiteróiBrazil

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