Introduction: The aim of this study was to assess the accuracy of iPex II (NSK, Tochigi, Japan) and Dentaport ZX (Morita Co, Kyoto, Japan) electronic apex locators (EALs) in working length determination in dry condition and in the presence of the following irrigants: 0.9% saline solution (NaCl), 2.6% sodium hypochlorite (NaOCl), and 2% chlorhexidine (CHX).
Materials and methods: Fifteen extracted, maxillary first molars were used. The actual canal lengths (ALs) were determined. An alginate model was used to determine the electronic length using a size 15 K-file by each EAL in different conditions. Percentage of accuracy was calculated at ±0.5 mm, 1 mm and 1.5 mm tolerance level. Statistical analysis was performed using the Friedman and Wilcoxon signed rank tests at a significance level of P < .05.
Results: Results revealed a non-significant difference between the ALs and the electronic lengths (ELs) of both EALs among different canal conditions. Also a non-significant difference was shown between both EALs among different canal conditions.
Conclusions: Both EALs are shown to be accurate in WL determination among different canal conditions.