A Comparison between In Vivo Radiographic Working Length Determination and Measurement after Extraction

Precision of Endodontic Working Length Measurements: A Pilot Investigation Comparing Cone-Beam Computed Tomography Scanning with Standard Measurement Techniques

“…It can be speculated that different teeth exhibit different discrepancies in their correlation between the CBCT and EAL root canal length measurements. A similar finding was suggested by Williams et al (25) in an assessment of length measurements by means of PA radiographs. The lowest Pearson coefficient (0.904) was found for the measurements performed in the mesiodistal CBCT sections when correlated to the EAL values (Table 1).…”

An Ex Vivo Comparison of Electronic Apex Locator Teaching Models

“…It is possible that this occurred because of the difficulty in interpreting the file position within the canal on the digital image and/or the inexperience of undergraduate students in assessing radiographs. In any case, overall, it seems that radiography alone is not sufficiently accurate, and EALs are a valuable adjunct (3,27). Thus, it is recommended that EALs be used in conjunction with radiographs to determine the working length (28).…”

Effects of voxel size and resolution on the accuracy of endodontic length measurement using cone beam computed tomography

“…However, the location of the apical position constitutes a persistent challenge in clinical endodontics. The use of an electronic apex locator (EAL) (ElAyouti et al, 2002;Ng et al, 2008), periapical radiograph (Williams et al, 2006;Vieyra and Acosta, 2011) or both (Ravanshad et al, 2010;Liang et al, 2013) is well documented for measuring the root canal WL.…”