{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T00:25:02Z","timestamp":1772151902650,"version":"3.50.1"},"reference-count":29,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2019,3,5]],"date-time":"2019-03-05T00:00:00Z","timestamp":1551744000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Invest &amp; Clin Dent"],"published-print":{"date-parts":[[2019,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The aim of the present study was to assess the clinical accuracy <jats:styled-content style=\"fixed-case\">APEX<\/jats:styled-content> and 0.5 marks of three different apex locators \u2013 <jats:styled-content style=\"fixed-case\">iP<\/jats:styled-content>ex <jats:styled-content style=\"fixed-case\">II<\/jats:styled-content>, Root <jats:styled-content style=\"fixed-case\">ZX<\/jats:styled-content>, and Apex <jats:styled-content style=\"fixed-case\">ID<\/jats:styled-content> \u2013 before and after canal preparation in the mandibular first molar.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Sixty patients between the ages of 13\u201060\u00a0years participated in the study. After access gaining and canal preparation stages files were inserted with the apex locator clip attached until the electronic apex locators (EALs) shows readings of APEX and 0.5 marks and same is confirmed with periapical radiographs. Eighteen apex locator readings were recorded from each tooth, and 1080 readings were obtained from the 60 patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Differences among readings from apex locators and radiographic readings were assessed using paired <jats:italic>t<\/jats:italic> test. Only in two patients (1 male and 1 female) were the <jats:styled-content style=\"fixed-case\">APEX<\/jats:styled-content> mark readings different from the radiograph estimation. When the 0.5 mark readings of three different EALs were compared with each other, we could observe that the readings from Root ZX differed significantly (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In the present study, we observed the negligible differences in readings between the <jats:styled-content style=\"fixed-case\">EAL<\/jats:styled-content> at the <jats:styled-content style=\"fixed-case\">APEX<\/jats:styled-content> mark readings, coinciding with the radiographic observation. Clinically, we recommend the apical foramen be located with the apex locators\u2019 APEX mark readings prior to identifying the apical constriction position.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jicd.12408","type":"journal-article","created":{"date-parts":[[2019,3,6]],"date-time":"2019-03-06T06:04:21Z","timestamp":1551852261000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Comparison of three different apex locators in determining the working length of mandibular first molar teeth with irreversible pulpitis compared with an intraoral periapical radiograph: A block randomized, controlled, clinical trial"],"prefix":"10.1111","volume":"10","author":[{"given":"Sadashivam","family":"Vanitha","sequence":"first","affiliation":[{"name":"Department of Conservative Dentistry and Endodontics CSI College of Dental Sciences and Research  Madurai Tamil Nadu India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1261-9842","authenticated-orcid":false,"given":"I. 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