Accuracy of an Electronic Apex Locator in the Retreatment of Teeth Obturated with Plastic or Cross-linked Gutta-percha Carrier-based Materials: An Ex Vivo Study

Mancini, Manuele; Palopoli, Pietro; Iorio, Lorenzo; Conte, G.; Cianconi, L

doi:10.1016/j.joen.2014.07.035

Cited by 9 publications

(8 citation statements)

References 36 publications

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“…Some researchers measure the minor diameter (apical constriction), whereas others measure the major diameter or apical foramen [56]. It is worth noting that EALs are highly accurate in determining the location of the minor constriction, but the mean distance from the file tip to the minor constriction always has a positive value [56, 57]. This means that EALs mostly overestimate the WL.…”

Section: Discussionmentioning

confidence: 99%

The influence of two forms of chlorhexidine on the accuracy of contemporary electronic apex locators

et al. 2019

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BackgroundAccurate determination of working length (WL) is crucial for the success of endodontic therapy. The aim of this study was to determine the influence of 2% chlorhexidine digluconate solution, 2% chlorhexidine digluconate gel and 2% hypochlorite solution on the accuracy of two devices: the Raypex 5 and the ApexDal.MethodsTwenty-nine single-rooted human teeth were used in this study. The crowns were cut horizontally and embedded in an alginate mass. In each tooth, six endodontic measurements were made using two electronic apex locators (EALs): a Raypex 5 and an ApexDal. For each EAL, measurements were taken with the following products: 2% chlorhexidine solution (CHX-S group), 2% chlorhexidine gel (CHX-G group) and 2% NaOCl (NaOCl group). After performing an endodontic measurement, the endodontic instruments were stabilized with flow resin composite. Afterwards, the roots were removed from the alginate mass, and the apical one-third of each root was cut lengthways to recover the canal system. Last, the distance between the file tip and the apical foramen was measured under a microscope at 60 x magnification.ResultsStatistically significant differences were found between CHX-S and NaOCl and CHX-G and NaOCl, but no significant differences were detected between CHX-S and CHX-G during the testing of both devices. No statistically significant differences were observed between the Raypex 5 and ApexDal for all intracanal media tested.ConclusionThe EALs Raypex 5 and ApexDal had higher accuracy in the anatomical foramen of the root containing chlorhexidine in the gel or in the solution form than in the canal containing sodium hypochlorite.

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Section: Discussionmentioning

confidence: 99%

The influence of two forms of chlorhexidine on the accuracy of contemporary electronic apex locators

et al. 2019

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“…Therefore, according to previous studies, during retreatment, it is impossible to completely remove the residual materials, sealer, gutta-percha, and solvents from the root canals, which affects the EAL readings. 17,18 The present study aimed to evaluate the accuracy of three EALs (Dentaport ZX, ProPex Pixi, and iPex II) in the determination of working length during root canal retreatment. EALs operate on electrical principles rather than being dependent on the biological properties of the tissue involved.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of the accuracy of different apex locators in determiningthe working length during root canal retreatment

Tüfenkçi

Kalayci

2020

J Dent Res Dent Clin Dent Prospects

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Background. This study aimed to assess the accuracy of three electronic apex locators (EALs) (DentaportZX [J Morita, Tokyo, Japan], Propex Pixi [Dentsply Maillefer, Ballaigues, Switzerland], and iPex II [NSK,Tokyo, Japan]) during root canal retreatment. Methods. The root canal lengths of 90 extracted single-rooted human teeth were determined under adental operating microscope at ×10 magnification. The actual working length (AWL) was 0.5 mm lessthan the root length. Electronic measurements were performed with the three EALs. The root canalswere instrumented and filled to the actual working length using the lateral compaction technique. Afterseven days, the teeth were retreated until the retreatment file was applied to the root canal at the workinglength determined by EALs, and then, the three EALs were used for determining the retreatmentworking length. Data were analyzed using chi-squared and Kruskal–Wallis tests. Results. In the retreatment, the accuracy of EALs was reported at %83.3 for Dentaport ZX, %83.4 forPropex Pixi, and %80 for iPex II within a tolerance of 0.5± mm of the AWL. Conclusion. Under the limitations of this study, Dentaport ZX, Propex Pixi, and iPex II can be a usefuladjunct during retreatment. Clinicians should be aware that residual materials in the root canal duringretreatment can affect the accuracy of EALs.

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“…WL studies rarely include huge volumes of data, and the results are mainly continuous numbers of distances to a target landmark. The raw data can be simply presented by plotting data points in Box Plots of different groups, or when pairwise analysis is performed, differences can be presented in relation to the equality line (Mancini et al, 2014; Miletic et al, 2011; Stoll et al, 2010; Uzun et al, 2008).…”

Section: Confidence Interval (Ci) and Sdmentioning

confidence: 99%

A critical analysis of research methods and experimental models to study working length determination and the performance of apex locators – A narrative review with recommendations for the future

et al. 2022

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Outcome studies have repeatedly shown that the apical endpoint of root canal preparation and filling is a determinate factor for the outcome of root canal treatment. Accurate determination of root canal length enhances the efficacy of chemo‐mechanical disinfection and prevents over‐/under‐instrumentation and over‐/under‐filling in relation to the canal terminus. Long and short root canal fillings are consistently reported to be associated with higher rates of post‐treatment endodontic disease. Although standards for undertaking and reporting diagnostic accuracy studies are available, publications dealing with the determination of root canal length are highly heterogeneous and describe procedures inconsistently. The aim of this review is to critically assess the methodology of publications in the past three decades. The process of planning, performing and analysing working length studies are presented stepwise with suggestions to optimize research methods.

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Accuracy of an Electronic Apex Locator in the Retreatment of Teeth Obturated with Plastic or Cross-linked Gutta-percha Carrier-based Materials: An Ex Vivo Study

Abstract: The measurements obtained with the EAL tested during orthograde retreatments can lead clinicians to overinstrumentation and consequent overfilling of the endodontic space.

Cited by 9 publications

References 36 publications

The influence of two forms of chlorhexidine on the accuracy of contemporary electronic apex locators

The influence of two forms of chlorhexidine on the accuracy of contemporary electronic apex locators

Evaluation of the accuracy of different apex locators in determiningthe working length during root canal retreatment

A critical analysis of research methods and experimental models to study working length determination and the performance of apex locators – A narrative review with recommendations for the future

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