Radiographic and electronic working length comparison. An in vivo study of three Electronic Apex Locator devices

V Di Taranto, A Libonati, E Montemurro, G Gallusi

Article ID: 6355
Vol 35, Issue 3S1, 2021
DOI: https://doi.org/10.23812/21-3supp1-10
Received: 9 July 2021; Accepted: 9 July 2021; Available online: 9 July 2021; Issue release: 9 July 2021

Abstract

The aim of this study is to compare the working length measured with Root ZX (EAL1), Propex II (EAL2) and Endo Analyzer Model 8005 (EAL3) with radiographic measurements during endodontic treatment. Fifty single canal teeth scheduled for endodontic treatment were selected for the study. After endodontic access preparation, pulp chamber was irrigated with 5mL of 5% sodium hypochlorite (NaOCl). The canal was scouted with a size 10 K-file introduced slightly over the apex to verify the canal patency. The working length (WL) was measured using all three EAL devices and radiographically. All measured working lengths were recorded and compared using ANOVA for repeated measures considering the multiple comparison of paired data Least Significant Difference (LSD). The WL mean values for EAL1 were 19.1 ± 1.7 mm; for EAL2 were 19.4 ± 1.7; for EAL3 were 19.4 ± 1.6 and for RG were 19.2 ± 1.7. The Pearson correlation coefficients indicated that the following correlation between electronic devices and radiographic WL: EAL1- 0.986, EAL2- 0.953 and EAL3- 0.931. Considering the mean values compared to radiographic measures, Root ZX gave better results than the other tested EAL devices. Endo Analyzer Model 8005 showed the worst performance.


Keywords

radiographic working length;endodontic working length;apex locator;root canal system;apical foramen


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