Accuracy and stability of electronic apex locator length measurements in root canals with wide apical foramen: an ex vivo study

摘要

Asterisk sign indicates true length measurement using microscopic examination when the tip of the file is visible at the apical foramen. After each step, the tooth was removed from the alginate mold, the apical foramen enlarged by one size, true length was reestablished, and the tooth was embedded again in an alginate mold for the next EAL measurement.