{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T17:21:38Z","timestamp":1787764898795,"version":"build-2784847793"},"reference-count":10,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","license":[{"start":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T00:00:00Z","timestamp":1775001600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Fracture of an endodontic instrument during an endodontic procedure is a common complication, but displacement of the separated instrument either inside or by the side of the inferior alveolar canal is very rare. This case report presents nonsurgical retreatment of a symptomatic, previously endodontically treated mandibular left first molar tooth with internal root resorption. The unique feature of this case report is the presence of a separated endodontic instrument entirely beyond the root apex and located deep within the body of the mandible. Under rubber dam isolation, access cavity preparation was carried out, and previous root canal obturating materials were removed. Intracanal dressing with calcium hydroxide was placed for two visits, and in the subsequent visit, the root canals were obturated. The periapical lesion healed at 24 months of follow-up. The separated endodontic instrument was monitored regularly through clinical and radiographic examinations, and the patient remained asymptomatic during this period.<\/jats:p>","DOI":"10.4103\/ccd.ccd_702_25","type":"journal-article","created":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T15:00:14Z","timestamp":1781535614000},"page":"122-125","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Nonsurgical Retreatment of a Mandibular Molar with Internal Resorption and a Separated Endodontic Instrument Deep within the Body of the Mandible"],"prefix":"10.4103","volume":"17","author":[{"given":"Kangjam Gunadhar","family":"Singh","sequence":"first","affiliation":[{"name":"Department of Conservative Dentistry and Endodontics, Dental College, Regional Institute of Medical Sciences, Imphal, Manipur, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Babina","family":"Chirom","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics and Crown and Bridge, Dental College, Regional Institute of Medical Sciences, Imphal, Manipur, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deepak Byathnal","family":"Suryakanth","sequence":"additional","affiliation":[{"name":"Department of Conservative Dentistry and Endodontics, Dental College, Regional Institute of Medical Sciences, Imphal, Manipur, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takhellambam Premlata","family":"Devi","sequence":"additional","affiliation":[{"name":"Department of Conservative Dentistry and Endodontics, Dental College, Regional Institute of Medical Sciences, Imphal, Manipur, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2026,6,15]]},"reference":[{"key":"R1-20260803","first-page":"11","article-title":"Obturation an overview","volume":"6","author":"Soumya","year":"2021","journal-title":"IP Ind J Conserv Endod"},{"key":"R2-20260803","doi-asserted-by":"crossref","first-page":"895","DOI":"10.1016\/j.joen.2011.04.002","article-title":"Impact of the quality of coronal restoration versus the quality of root canal fillings on success of root canal treatment: A systematic review and meta-analysis","volume":"37","author":"Gillen","year":"2011","journal-title":"J Endod"},{"key":"R3-20260803","doi-asserted-by":"crossref","first-page":"1381","DOI":"10.1016\/j.joen.2024.07.013","article-title":"Effect of the time interval of functional loading on the periapical healing of endodontically treated mandibular molar teeth with pulp necrosis and asymptomatic apical periodontitis: A split-mouth randomized clinical study","volume":"50","author":"Kangjam","year":"2024","journal-title":"J Endod"},{"key":"R4-20260803","doi-asserted-by":"crossref","first-page":"129","DOI":"10.4103\/JCD.JCD_507_18","article-title":"Success or failure of endodontic treatments: A retrospective study","volume":"22","author":"Santos-Junior","year":"2019","journal-title":"J Conserv Dent"},{"key":"R5-20260803","doi-asserted-by":"crossref","first-page":"414","DOI":"10.1016\/j.joen.2024.01.013","article-title":"Outcome of contemporary nonsurgical endodontic retreatment: A systematic review of randomized controlled trials and cohort studies","volume":"50","author":"Sabeti","year":"2024","journal-title":"J Endod"},{"key":"R6-20260803","doi-asserted-by":"crossref","first-page":"105","DOI":"10.4103\/jcd.jcd_303_21","article-title":"Cyclic and spontaneous movement of a fractured and extruded instrument back into the root canal: A rare case report","volume":"25","author":"Hirani","year":"2022","journal-title":"J Conserv Dent"},{"key":"R7-20260803","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1038\/s41368-025-00372-w","article-title":"Expert consensus on management of instrument separation in root canal therapy","volume":"17","author":"Fan","year":"2025","journal-title":"Int J Oral Sci"},{"key":"R8-20260803","doi-asserted-by":"crossref","first-page":"916","DOI":"10.4103\/JCDE.JCDE_307_25","article-title":"A nationwide cross-sectional study on endodontic instrument fractures and development of a comprehensive classification system","volume":"28","author":"Rao","year":"2025","journal-title":"J Conserv Dent Endod"},{"key":"R9-20260803","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1016\/j.joen.2025.10.002","article-title":"Migration of a separated endodontic file into the mandibular canal: An 8-year follow-up case report","volume":"52","author":"Katz","year":"2026","journal-title":"J Endod"},{"key":"R10-20260803","doi-asserted-by":"crossref","first-page":"736","DOI":"10.4103\/0970-9290.93476","article-title":"Displacement of endodontic instruments in inferior alveolar canal","volume":"22","author":"Gandhi","year":"2011","journal-title":"Indian J Dent Res"}],"container-title":["Contemporary Clinical Dentistry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/ccd.ccd_702_25","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T16:50:11Z","timestamp":1787763011000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/ccd.ccd_702_25"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4]]},"references-count":10,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2026]]}},"URL":"https:\/\/doi.org\/10.4103\/ccd.ccd_702_25","relation":{},"ISSN":["0976-237X","0976-2361"],"issn-type":[{"value":"0976-237X","type":"print"},{"value":"0976-2361","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,4]]},"assertion":[{"value":"2025-11-25","name":"received","label":"Received","group":{"name":"publication_history","label":"Publication 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