An evaluation of the Apex Locator Endocater

Area of Science:

• Endodontics
• Dental Anatomy
• Diagnostic Technology

Background:

• Accurate working length determination is crucial in endodontic therapy.
• The apical constriction's position relative to the anatomical apex is a key landmark.
• Existing methods for locating the apical constriction have limitations.

Purpose of the Study:

• To evaluate the Endocater's ability to locate the apical constriction.
• To determine the relationship between the apical constriction and the anatomical apex.
• To assess the accuracy of Endocater probes in intact permanent teeth.

Main Methods:

• Conventional endodontic access cavities were prepared in teeth planned for extraction.
• The Endocater device with bonded coated probes was used to determine working length.
• Teeth were extracted, sectioned, and probe position analyzed using an ocular microscope.

Main Results:

• The Endocater successfully located the apical constriction within 0.5 mm in 93.4% of canals where probes reached the apex.
• Probes failed to reach the apical portion in 17.1% of canals due to binding.
• Measurements confirmed the probe's position relative to the anatomical apex and apical constriction.

Conclusions:

• The Endocater demonstrates high accuracy in locating the apical constriction when probes can reach the apical third.
• Probe binding in coronal portions presents a limitation for the Endocater's application.
• Further research may be needed to optimize probe design for improved canal negotiation.