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Accuracy of the D entaport ZX apex locator for working length determination when retreating molar root canals
Author(s) -
Cimilli Hale,
Aydemir Seda,
Arıcan Burcin,
Mumcu Gonca,
Chandler Nicholas,
Kartal Nevin
Publication year - 2014
Publication title -
australian endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.703
H-Index - 34
eISSN - 1747-4477
pISSN - 1329-1947
DOI - 10.1111/aej.12010
Subject(s) - apical foramen , molar , apex (geometry) , root canal , foramen , dentistry , significant difference , orthodontics , mathematics , medicine , anatomy , statistics
The aim of this study was to evaluate the accuracy of the D entaport ZX apex locator for working length determination during root canal retreatment of mandibular molars. Fifteen extracted mandibular first molars with separate mesial canals and apical foraminae and one distal canal were selected. The mesiobuccal and distal canals were investigated; the length with the file tip at the major diameter was defined as the tooth length ( TL ). The canals were prepared with ProTaper files to 1 mm short of this and filled with gutta‐percha and AH P lus sealer. One week later, the root fillings were removed using ProTaper retreatment files. Tooth length was remeasured and recorded as the retreatment tooth length ( RTL ). Then electronic measurements were taken at the major (electronic apex locator ( EAL) major) and minor ( EAL minor) foraminae as suggested by the instrument display. These lengths were compared with RTL and measurements 0.5 and 1 mm short of this distance. For both canals, no significant difference was found between RTL and EAL major, and 0.5 mm short of RTL and EAL minor ( P > 0.05). There were significant differences found between all other readings. The Dentaport ZX could not detect the minor foramen accurately but was able to indicate the major foramen in molars undergoing a root canal retreatment procedure.