{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T06:50:42Z","timestamp":1791442242687,"version":"4.3.3"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"vor","delay-in-days":279,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Dentistry"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Mandibular premolars exhibit complex root canal systems, making them highly challenging to manage endodontically. Canal configurations vary from one to five canals. Successful endodontic treatment requires a thorough knowledge of standard anatomy and its variations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Presentation<\/jats:title>\n                    <jats:p>This case report presents the endodontic retreatment of a right mandibular first premolar with four separate root canals in a 36\u2010year\u2010old male. Initial clinical and radiographic examinations showed a complex root canal anatomy. With the aid of a dental operating microscope (DOM) and cone\u2010beam computed tomography (CBCT), a missed distolingual canal was successfully identified along with the mesiobuccal, mesiolingual, and distobuccal canals. The root canals were prepared, disinfected, and densely obturated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This report highlights the importance of detailed root canal exploration using advanced diagnostic tools like DOM and CBCT to ensure the successful management of rare anatomical variations in mandibular premolars.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1155\/crid\/4489618","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T06:06:32Z","timestamp":1791439592000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Endodontic Retreatment of a Mandibular First Premolar With Unusual Four Root Canal Morphology: A Case 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