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Accuracy of Working Length Determination using NovApex and Root-ZX Apex Locators: An in vitro Study
Vahid Zand1, Saeed Rahimi1, Paria Davoudi2
1Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, East Azerbaijan, Islamic Republic of Iran.
Introduction:
This ex vivo study evaluated the accuracy of the Root-ZX electronic apex locator (EAL) (J. Morita, Tokyo, Japan) and the NovApex (Forum Technologies, Rishon Lezion, Israel) in determining the working length (WL) during endodontic treatment.
Materials And Methods:
Forty extracted single-rooted human teeth were selected for this study. The actual WL was measured with visual technique by a size #15 k-file under magnification. Then, the canal lengths were measured electronically with both Root-ZX and NovApex apex locators within ±0.5 and ±1 mm. Mean percentage of data was analyzed between groups using paired t-test, with a statistically significant level of p < 0.05.
Results:
The accuracy of NovApex apex locator was 85% within ±0.5 mm and 92.5% within ±1 mm. The accuracy of Root-ZX apex locator was 70% within ±0.5 mm and 97.5% within ±1 mm. There was no significant difference between the accuracy of the two EALs.
Conclusion:
Both the NovApex and Root-ZX EALs are useful for measuring the WL with high accuracy.
Clinical Significance:
Given the importance of accurate WL determination in the success of endodontic treatments, the accuracy of different apex locators should be evaluated.
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