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Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Aug;110(2):e57-61. doi: 10.1016/j.tripleo.2010.03.005. Epub 2010 Jun 23.

An ex vivo comparison of root canal length determination by three electronic apex locators at positions short of the apical foramen.

Author information

1
School of Dentistry of Sobral, Federal University of CearĂ¡, Fortaleza, CearĂ¡, Brazil. bcv@usp.br

Abstract

OBJECTIVE:

The aim of this study was to evaluate the precision of working length determination of 3 electronic apex locators (EALs): Root ZX, RomiApex D-30, and Ipex at 0.0 mm, at the apical foramen (AF), and at 1.0 mm short of the AF.

METHODOLOGY:

Thirty-eight mandibular premolars had their real lengths previously determined. Electronic measurements were determined at 1.0 mm, followed by measurements at 0.0 mm, performed in triplicate.

RESULTS:

Precision of devices at 1.0 mm and 0.0 mm were: 94.7% and 97.4%, respectively (Root ZX); 78.9% and 97.4% (RomiApex D-30); and 76.3% and 97.4% (Ipex). Although no statistical differences were observed between the EALs at 0.0, at 1.0 mm Root ZX performed significantly better than the others.

CONCLUSION:

The EALs had acceptable precision when measuring the working length at the AF. However, when used at levels short of the AF, only Root ZX did not suffer a significant negative effect on precision.

PMID:
20573531
DOI:
10.1016/j.tripleo.2010.03.005
[Indexed for MEDLINE]

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