Related Experiment Video
Updated: Jun 16, 2026
16:30
Application of Light-cured Dental Adhesive Resin for Mounting Electrodes or Microdialysis Probes in Chronic Experiments
Published on: July 30, 2007
[Electronic Apex Locator as a dental instrument]
S Lin1, O Winocur-Arias, I Slutzky-Goldberg
1Endodontics and Dental Trauma Unit, Dept. of Dental Medicine, Rambam Medical Center, Haifa, Israel.
Refu'At Ha-Peh Veha-Shinayim (1993)
|February 19, 2010
Summary
Electronic Apex Locators (EALs) have evolved significantly, with third-generation devices accurately locating the root canal apex even in the presence of fluids. Newer generations offer advanced features for improved endodontic treatment.
Area of Science:
- Endodontics
- Biomedical Engineering
Context:
- Electronic Apex Locators (EALs) are crucial tools in modern endodontic procedures.
- Early EAL generations faced limitations with accuracy, particularly in the presence of conductive fluids within root canals.
Purpose:
- To review the evolution and advancements in Electronic Apex Locator technology.
- To highlight the improvements in accuracy and reliability across different EAL generations.
Summary:
- The first EALs (1962) relied on constant electrical resistance and were inaccurate with fluids.
- Third-generation EALs utilize dual frequencies to calculate impedance, providing reliable apex detection in various canal conditions, including the presence of blood or necrotic tissue.
- Fourth-generation EALs incorporate multifrequency currents or lookup matrices, with some devices being more compact and computer-connectable.
Impact:
- Improved accuracy of Electronic Apex Locators enhances the success rates of root canal treatments.
- Technological advancements in EALs contribute to more predictable and efficient endodontic outcomes.
- The development of sophisticated EALs supports minimally invasive endodontic techniques.
Related Concept Videos
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
01:30Electronic Distance Measuring Instruments
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...