Endodontics · single question

Electronic apex locators CANNOT determine which of the following?

Canal curvature
Canal length
Apical foramen location
Canal perforation
Apical constriction

Show answer and explanation

Correct answer: A. Canal curvature

Electronic apex locators use electrical resistance to locate the apical foramen and constriction, calculate canal length, and detect perforations. Canal CURVATURE cannot be determined by an apex locator u2014 this requires careful interpretation of periapical radiographs and tactile feedback during instrumentation.

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