Preflaring effects on the accuracy of three electronic apex locators

Morgental, Renata Dornelles; Vier-Pelisser, Fabiana Vieira; Luisi, Simone Bonato; Cogo, Deborah Meirelles; Kopper, Patrícia Maria Poli

doi:10.1590/s1980-65232011000400010

Cited by 5 publications

(5 citation statements)

References 3 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The accurate readings were also superior in the pre-flared canals for the Novapex using #10 and #15 K-files. A recent study 21 showed that the accuracy of the Novapex increased after the pre-flaring of the incisor mandibular canals, but there was no significant difference compared with the un-flared canals. Equivalent performances of the Novapex and Root ZX could be expected using a #20 K-file in the pre-flared canals in the present study.…”

Section: Discussionmentioning

confidence: 96%

Effect of pre-flaring and file size on the accuracy of two electronic apex locators

et al. 2012

View full text Add to dashboard Cite

ObjectiveThis 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 and methodsThe 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 pre-flaring 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). ResultsICCs 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. ConclusionsThe tested EALs showed acceptable accuracy, whereas the pre-flaring procedure revealed a more significant effect than the used file size.

show abstract

Section: Discussionmentioning

confidence: 96%

Effect of pre-flaring and file size on the accuracy of two electronic apex locators

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Other factors still need to be more questionable and require further research. In the present study, pre-widening of the cervical and middle thirds was performed to favor electronic determinations of EFLs, as suggested in previous works (17,14,15). Although Ebrahim et crease in the apical diameter of instrumentation did not significantly influence the efficacy of the devices.…”

Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

“…Morgental et al . ( 17 ) observed that pre-widening the cervical third is advantageous in the accuracy of LEFs; the best results of these appliances are obtained after cervical preparation ( 14 ). However, Maia-Filho et al .…”

Section: Discussionmentioning

confidence: 99%

“…Duran-Sindreu et al (16), when comparing the accuracy of the Root ZX II in an in vivo and in vitro group, observed no statistically significant differences between these groups. Morgental et al (17) observed that pre-widening the cervical third is advantageous in the accuracy of LEFs; the best results of these appliances are obtained after cervical preparation (14). However, Maia-Filho et al (21), when comparing the accuracy of Root ZX II and RomiApex A15, observed that these two appliances showed similar accuracy, considering RomiApex A15 a reliable option for CT determination.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Ex vivo evaluation of the accuracy of four electronic foraminal locators

Lima,

Paula,

Palheta-Filho

et al. 2024

J Clin Exp Dent

View full text Add to dashboard Cite

Background To evaluate the accuracy of four different Electronic Foraminal Locators (EFLs): Root ZX II (J. Morita, Tokyo, Japan), Romiapex A15 (Romidan, Kiryat-Ono, Israel), FinePex (Schuster, Porto Alegre, Brazil), and VDW Gold (VDW, Munich, Germany), in determining root canal length. Material and Methods Twenty-seven human single-rooted teeth had their crowns sectioned at the cementoenamel junction, and the actual length of the tooth was obtained by visualizing with an operative microscope a #15 file placed adjacent to the apical foramen. The teeth were instrumented with R25 and R40 files, and at the end of each instrumentation, measurements of the lengths of the root canals were made with #25 and #40 files. The data were statistically analyzed by ANOVA and chi-square tests and were considered significant when P <0.05. All devices showed a tendency to underestimate measurements by 0.25 mm diameter. Results The mean accuracy of the Root ZX II appliance was statistically lower than the other EFLs ( P <0.001). For the 0.40 mm diameter, the mean accuracy of the Romiapex A15 appliance was statistically higher than the other LEFs ( P <0.001). However, when the diameter was 0.40 mm, only the Romiapex A15 device tended to overmeasure. Regarding the acceptable limits of variation, it was observed that the devices showed similar efficiency in determining odontometry ( P >0.05), both with diameters of 0.25 mm and 0.40 mm. Conclusions It was concluded that the devices presented similar and adequate efficacy when observing the limits of acceptable measurements. It was observed that increasing the apical diameter did not influence the accuracy of EFLs in determining root canal lengths. Key words: Endodontics, working length, electronic foraminal locators, endodontic treatment.

show abstract