Effect of pre-flaring and file size on the accuracy of two electronic apex locators
J. appl. oral sci
;
20(5): 538-543, Sept.-Oct. 2012. ilus, graf
Article
in English
| LILACS
| ID: lil-654918
ABSTRACT
OBJECTIVE:
This ex vivo study evaluated the effect of pre-flaring and file size on the accuracy of the Root ZX and Novapex electronic apex locators (EALs). MATERIAL ANDMETHODS:
The actual working length (WL) was set 1 mm short of the apical foramen in the palatal root canals of 24 extracted maxillary molars. The teeth were embedded in an alginate mold, and two examiners performed the electronic measurements using #10, #15, and #20 K-files. The files were inserted into the root canals until the "0.0" or "APEX" signals were observed on the LED or display screens for the Novapex and Root ZX, respectively, retracting to the 1.0 mark. The measurements were repeated after the preflaring using the S1 and SX Pro-Taper instruments. Two measurements were performed for each condition and the means were used. Intra-class correlation coefficients (ICCs) were calculated to verify the intra- and inter-examiner agreement. The mean differences between the WL and electronic length values were analyzed by the three-way ANOVA test (p<0.05).RESULTS:
ICCs were high (>0.8) and the results demonstrated a similar accuracy for both EALs (p>0.05). Statistically significant accurate measurements were verified in the pre-flared canals, except for the Novapex using a #20 K-file.CONCLUSIONS:
The tested EALs showed acceptable accuracy, whereas the pre-flaring procedure revealed a more significant effect than the used file size.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Root Canal Preparation
/
Tooth Apex
/
Dental Instruments
/
Dental Pulp Cavity
/
Odontometry
Type of study:
Evaluation studies
Limits:
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2012
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
University of Itaúna/BR
/
University of São Paulo/BR
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