{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,27]],"date-time":"2025-06-27T07:30:56Z","timestamp":1751009456101,"version":"3.37.3"},"reference-count":25,"publisher":"FapUNIFESP (SciELO)","issue":"6","license":[{"start":{"date-parts":[[2019,11,1]],"date-time":"2019-11-01T00:00:00Z","timestamp":1572566400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2019,11,1]],"date-time":"2019-11-01T00:00:00Z","timestamp":1572566400000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2019,11,1]],"date-time":"2019-11-01T00:00:00Z","timestamp":1572566400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Braz. Dent. J."],"abstract":"<jats:p>Abstract Electronic apex locators (EAL) have been used to establish the working length (WL) in root canal treatment. In teeth diagnosed with apical periodontitis, resorption of tooth apical structures can lead to difficulties to obtain an appropriate WL. The aim was to compare the capacity of three EAL\u2019s (Root ZX II, Raypex 6 and Endo-Eze Quill) to locate the tip of the K-file between 0 to -0.5 mm from the apical foramen (AF) on teeth diagnosed with asymptomatic apical periodontitis (AAP). Electronic working length was performed on 60 roots with AAP. A K-file #15 was inserted in the root canal until the apical foramen (AF) was located, and followed was re-adjusted to -0.5 mm through observation in EAL display. The K-file was fixed to the tooth with composite and teeth were extracted. The 4 apical millimeters were worn out until the K-file could be seen and were prepared and measured its distance to AF in a scanning electron microscope. Appropriate WL was when the tip of the K-file was located between 0 to -0.5 mm from AF. Results: Root ZX II showed significant difference (p&lt;0.01) with the other two EALs. Root ZX II presented the better performance than Raypex 6 or Endo-Eze Quill in teeth with AAP.<\/jats:p>","DOI":"10.1590\/0103-6440201902705","type":"journal-article","created":{"date-parts":[[2019,11,27]],"date-time":"2019-11-27T19:25:54Z","timestamp":1574882754000},"page":"550-554","source":"Crossref","is-referenced-by-count":5,"title":["Analysis of Electronic Apex Locators in Human Teeth Diagnosed With Apical Periodontitis"],"prefix":"10.1590","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4388-4865","authenticated-orcid":false,"given":"Norberto J","family":"Broon","sequence":"first","affiliation":[{"name":"Universidad de Guadalajara, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0836-4186","authenticated-orcid":false,"given":"Claudia Azucena","family":"Palafox-S\u00e1nchez","sequence":"additional","affiliation":[{"name":"Research Institute of Biomedical Sciences, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1488-0366","authenticated-orcid":false,"given":"Carlos","family":"Estrela","sequence":"additional","affiliation":[{"name":"Universidade Federal de Goi\u00e1s, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7814-0191","authenticated-orcid":false,"given":"Diana Celeste Salazar","family":"Camarena","sequence":"additional","affiliation":[{"name":"Universidad de Guadalajara, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7245-1447","authenticated-orcid":false,"given":"Mario","family":"Uribe","sequence":"additional","affiliation":[{"name":"Universidad de Guadalajara, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9407-4953","authenticated-orcid":false,"given":"Israel","family":"Ceja","sequence":"additional","affiliation":[{"name":"Universidad de Guadalajara, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlos S.","family":"Ramos","sequence":"additional","affiliation":[{"name":"Roseman University of Health Sciences, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4591-4362","authenticated-orcid":false,"given":"Alvaro","family":"Cruz","sequence":"additional","affiliation":[{"name":"Research Institute of Biomedical Sciences, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","published-online":{"date-parts":[[2019,11]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"617","DOI":"10.1016\/S1079-2104(99)70145-9","article-title":"Persistent periapical radiolucencies of root-filled human teeth, failed endodontics treatments and periapical scars","volume":"87","author":"Nair PNR","year":"1999","journal-title":"Oral Surg Oral Med Oral Pathol Oral Radiol Endod"},{"year":"2016","series-title":"Glossary of Terms Used in Endodontics","key":"ref2"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1046\/j.1365-2591.1998.00183.x","article-title":"Apical limit of root canal instrumentation and obturation, part 2. 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