Accuracy of electronic apex locators to detect root canal perforations with inserted metallic posts: an ex vivo studyReport as inadecuate




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Head and Face Medicine

, 10:57

First Online: 23 December 2014Received: 23 October 2014Accepted: 12 December 2014

Abstract

IntroductionThe detection of possible root canal perforations caused during a metal post placement is frequently difficult to diagnose. The aim of this study was to investigate the accuracy of apex locators to diagnose such perforations.

Materials and methodsThirty mesiolingual root canals of extracted mandibular molars were instrumented 30-.04 and a post space was prepared. A root canal perforation was intentionally made at the bi-furcation n = 15. Metal posts were cemented in 15 perforated and 15 non-perforated root canals. The teeth roots were embedded in an agar-agar solution. The resulting measurements -short- or -beyond- the apex disclosed if a perforation could be identified with five different apex locators ProPex II, Elements Apex Locator, Apex NRG, Raypex 5 and Raypex 6. The sensitivity and specificity 95% interval confidence were calculated.

ResultsAll devices excluded the absence of perforations 100% with 95% confidence interval 78%; 100% specificity. The Apex NRG and Raypex 6 detected all perforations 100% with 95% confidence interval 78%; 100% sensitivity. The ProPex II, Elements Apex Locator, and Raypex 5 detected 14 out of 15 perforations 93% with 95% confidence interval 68%; 100% sensitivity.

ConclusionsAll devices determined root canal perforations, due to metallic posts, within clinical acceptable ranges.

KeywordsRoot perforation Metal post Diagnosis Apex locators Electronic supplementary materialThe online version of this article doi:10.1186-s13005-014-0057-2 contains supplementary material, which is available to authorized users.

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Author: Benjamín Briseño Marroquín - Claudia Cortazar Fernández - Irene Schmidtmann - Brita Willershausen - Fernando Goldberg

Source: https://link.springer.com/







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