The Effect of Cervical Preflaring Using Different Rotary Nickel-Titanium Systems on the Accuracy of Apical File Size Determination

Tennert, Christian; Herbert, Josef; Altenburger, Markus Jörg; Wrbas, Karl-Thomas

doi:10.1016/j.joen.2010.06.017

Cited by 24 publications

(29 citation statements)

References 23 publications

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“…The removal of this cervical interference by pre-flaring improved the accuracy of the work length and file size determination 25,31 . However, the pre-flaring of the root canals and measuring file characteristics are controversial topics related to the accuracy of the EALs.…”

Section: Discussionmentioning

confidence: 99%

“…Large diameter files will fit more tightly, thus producing more accurate electronic measurements 9 . In this regard, pre-flaring facilitates a larger file size to reach the apical constriction, once it removes cervical dentin interferences 31 . Furthermore, this procedure establishes a more accurate relationship between the file size and anatomical foramen diameter 25 .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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“…Tennert et al . () stated that an exact determination of apical root canal diameter is crucial for correct cleaning and shaping of a root canal, and coronal flaring increases the accuracy of apical size determination. Additionally, coronal flaring can create a reservoir for collection of debris in the coronal portion of the root, as NiTi instruments generally tend to direct debris coronally (Imura et al .…”

Section: Introductionmentioning

confidence: 99%

Effect of coronal flaring on apical extrusion of debris during root canal instrumentation using single‐file systems

et al. 2015

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“…[19] The apical diameter proved to be at least one file size or two sizes larger once preflaring was done. [1315] But these studies do not give information about the discrepancy between the apical canal diameter and the file diameter before and after preflaring.…”

Section: Discussionmentioning

confidence: 99%

To determine whether the first file to bind at the working length corresponds to the apical diameter in roots with apical curvatures both before and after preflaring

2012

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Aim:To evaluate the discrepancies between the diameter of the canal and the first file to bind at the working length, before and after preflaring in teeth with apical curvatures.Materials and Methods:Twenty teeth with apical curvatures were selected for the study. Following access, the patency file was fixed at the working length, and the apices were ground perpendicular to the canal at this level. Diameters of canal and the first file to bind at the working length were observed for each tooth, both before and after preflaring, under stereomicroscope at 30X magnification.Results:ANOVA and post hoc Bonferroni tests showed significant differences in both groups regarding anatomical diameter at working length and the first file to bind. The area of contact of the file at apical region remained the same in both groups.Conclusion:Using the first file to bind for gauging the diameter of the apical canal was found to be an unreliable method in teeth with apical curvatures, even after preflaring.

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The Effect of Cervical Preflaring Using Different Rotary Nickel-Titanium Systems on the Accuracy of Apical File Size Determination

Cited by 24 publications

References 23 publications

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

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

Effect of coronal flaring on apical extrusion of debris during root canal instrumentation using single‐file systems

To determine whether the first file to bind at the working length corresponds to the apical diameter in roots with apical curvatures both before and after preflaring

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