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. 2018 Jan-Mar;9(1):88-91.
doi: 10.4103/ccd.ccd_790_17.

Comparison of Tentative Radiographic Working Length with and without grid Versus Electronic Apex Locator

Tanikonda Rambabu  1 , Visinigiri Srikanth  1 , Girija S Sajjan  1 , Sirisha Ganguru  1 , Chava Gayatri  1 , K Roja  2
Affiliations

Comparison of Tentative Radiographic Working Length with and without grid Versus Electronic Apex Locator

Tanikonda Rambabu et al. Contemp Clin Dent. 2018 Jan-Mar.

Abstract

The apical termination of obturation is the most important factor influencing the success of root canal treatment (RCT). Working length (WL) is the key element in achieving this.

Aim: The aim of this study is to compare and evaluate the preoperative estimated WL with conventional radiograph and with grid radiograph, with reference to electronic apex locator (EAL) in single-rooted teeth.

Settings and design: Thirty permanent anterior teeth with complete root formation indicated for RCT were included in this study.

Materials and methods: Conventional radiograph (Group 1) and conventional radiograph with external grid (Group 2) were made before access opening. WL with EAL (Group 3) was determined after access opening.

Statistical analysis: The statistical package for the social sciences (SPSS) version 16.0 (SPSS Inc., Chicago, IL, USA) was used to compare the WLs of three groups, and the statistical significance was considered to be P ≤ 0.05. ANOVA, post hoc test were made to measure the intergroup comparison, and Pearson correlation values were obtained.

Results and conclusion: The results of the study showed a higher correlation between grid WL and apex locator WL than conventional WL and apex locator WL. Preoperative metrics with radiographic grid along with the apex locator is a better measuring tool compared to the conventional radiographic WL in a single-rooted tooth.

Keywords: Apical constriction; electronic apex locator; radiographic grid; working length determination.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Radiograph with grid over maxillary anterior tooth
See this image and copyright information in PMC

References

    1. Moura MS, Guedes OA, De Alencar AH, Azevedo BC, Estrela C. Influence of length of root canal obturation on apical periodontitis detected by periapical radiography and cone beam computed tomography. J Endod. 2009;35:805–9. - PubMed
    1. Vieyra JP, Acosta J. Comparison of working length determination with radiographs and four electronic apex locators. Int Endod J. 2011;44:510–8. - PubMed
    1. Aggarwal V, Singla M, Bhasin SS. Influence of instrument size and varying electrical resistance of root canal instruments on accuracy of three electronic root canal length measurement devices. Int Endod J. 2017;50:506–11. - PubMed
    1. Leonardo MR, Silva LA, Nelson-Filho P, Silva RA, Raffaini MS. Ex vivo evaluation of the accuracy of two electronic apex locators during root canal length determination in primary teeth. Int Endod J. 2008;41:317–21. - PubMed
    1. Vande Voorde HE, Bjorndahl AM. Estimating endodontic “working length” with paralleling radiographs. Oral Surg Oral Med Oral Pathol. 1969;27:106–10. - PubMed