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Electronic Apex Locator: Understanding Your Most Important Tool

CE Credits: 1.5 Hour(s)
Intended Audience: Dentists, Specialists, Expanded Function Dental Assistants, Dental Hygienists, Dental Students
Date Course Online: May 1 , 2020
Last Revision Date: N/A
Course Expiration Date: May 1, 2023
Cost: FREE to view (does not include continuing education credits); Registration is still required.
To receive continuing education credits:
Dentist, $37.50
Penn Dental Medicine Alumni, $28.00
Military, $28.00
Method: Self-instructed
Register: Click Here »

Course Description

Modern electronic apex locators have become one of the most essential tools to achieve an ideal outcome in root canal treatment. However, despite its popularity, there are still many confusions regarding the mechanics and physics of the device, leading to misusage and inaccuracy of working length determination. The goal of this presentation is to clarify the fundamental operating principles of modern EALs, explain why certain clinical situations may or may not interfere with EAL readings, and overall improve its clinical performance.
Learning Objectives

  • Explain the evolution of electronic apex locators and the physics behind its development
  • Clinical applications and troubleshooting with modern electronic apex locators


Stephanie J Chen, DDS Raised in Taipei, Taiwan, Dr. Chen received her Doctor of Dental Surgery degree from Taipei Medical University and her certificate in general practice residency training from Chang Gung Memorial Hospital. She later returned to the United States and completed her advanced specialty training in Endodontics at the University of Pennsylvania and subsequently completed all phases of certification by the American Board of Endodontics. Dr. Chen is now a Diplomate of the American Board of Endodontics and practices in Seattle and Everett, WA.

University of Pennsylvania School of Dental Medicine is an ADA CERP Recognized Provider. ADA CERP is a service of the American Dental Association to assist dental professionals in identifying quality providers of continuing dental education. ADA CERP does not approve or endorse individual courses or instructors, nor does it imply acceptance of credit hours by boards of dentistry.

University of Pennsylvania School of Dental Medicine designates this activity for 1.5 continuing education credits.

Continuing Education
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