{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T00:38:35Z","timestamp":1792543115046,"version":"4.5.0"},"reference-count":9,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"16","license":[{"start":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T00:00:00Z","timestamp":1792368000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Neurosurg Case Lessons"],"published-print":{"date-parts":[[2026,10,19]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>Posterior migration of a mobile-bearing cervical disc replacement (CDR) can be catastrophic. The authors report a single-patient case of catastrophic failure after recent trauma and implant loosening.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>A 48-year-old woman had received C5\u20136 and C6\u20137 Mobi-C CDRs at an outside institution 3 weeks before presentation and had sustained a ground-level fall 8 days before presentation. Outside imaging from after the fall showed implant loosening. After subsequently lifting a laundry basket, the patient developed acute quadriparesis with complete motor and sensory loss below C7. CT demonstrated catastrophic C5\u20136 and C6\u20137 hardware failure with posterior migration of the C6\u20137 polyethylene insert into the canal. Emergency revision C5\u20137 anterior cervical discectomy and fusion was performed, but she remained American Spinal Injury Association Impairment Scale grade A at the 1-year follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Patients with recent trauma and radiographic evidence of loosening, posterior endplate translation, loss of endplate parallelism, or polyethylene core malposition should prompt urgent surgical evaluation and likely revision.<\/jats:p>\n                    <jats:p>\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/thejns.org\/doi\/10.3171\/CASE26740\">https:\/\/thejns.org\/doi\/10.3171\/CASE26740<\/jats:ext-link>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case26740","type":"journal-article","created":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T00:00:50Z","timestamp":1791936050000},"source":"Crossref","is-referenced-by-count":0,"title":["Early catastrophic posterior migration of a cervical disc replacement polyethylene insert resulting in complete spinal cord injury: illustrative case"],"prefix":"10.3171","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-2561-9370","authenticated-orcid":true,"given":"Pirooz","family":"Fereydouni","sequence":"first","affiliation":[{"name":"School of Medicine, University of California, Irvine;"},{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-0444-1558","authenticated-orcid":true,"given":"Arthur W.","family":"Cowman","sequence":"additional","affiliation":[{"name":"School of Medicine, University of California, Irvine;"},{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew J.","family":"Strok","sequence":"additional","affiliation":[{"name":"School of Medicine, University of California, Irvine;"},{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sultan","family":"Baz","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shahabeddin","family":"Yazdanpanah","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"},{"name":"College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan","family":"Hoang","sequence":"additional","affiliation":[{"name":"School of Medicine, University of California, Irvine;"},{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2532-5851","authenticated-orcid":true,"given":"Michael S.","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sohaib Z.","family":"Hashmi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3575-2758","authenticated-orcid":true,"given":"Don Y.","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7905-3305","authenticated-orcid":true,"given":"Nitin N.","family":"Bhatia","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu-Po","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao-Hua","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of California, Irvine, Orange, California"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"8","key":"bib1","series-title":"Bone Joint J","first-page":"991","article-title":"Total disc replacement versus anterior cervical discectomy and fusion: a systematic review with meta-analysis of data from a total of 3160 patients across 14 randomized controlled trials with both short- and medium- to long-term outcomes","volume":"100-B","author":"Findlay","year":"2018","unstructured":"Findlay CAyis SDemetriades AK.Total disc replacement versus anterior cervical discectomy and fusion: a systematic review with meta-analysis of data from a total of 3160 patients across 14 randomized controlled trials with both short- and medium- to long-term outcomes. Bone Joint J. 2018;100-B(8):991-1001. doi:10.1302\/0301-620X.100B8.BJJ-2018-0120.R1"},{"issue":"3","key":"bib2","series-title":"Spine J","first-page":"353","article-title":"Failure in cervical total disc arthroplasty: single institution experience, systematic review of the literature, and proposal of the RUSH TDA failure classification system","volume":"22","author":"Zavras","year":"2022","unstructured":"Zavras AGSullivan TBSingh KPhillips FMColman MW.Failure in cervical total disc arthroplasty: single institution experience, systematic review of the literature, and proposal of the RUSH TDA failure classification system. Spine J. 2022;22(3):353-369. doi:10.1016\/j.spinee.2021.08.006"},{"key":"bib3","series-title":"USA. Mobi-C Cervical Disc Surgical Technique: \u00adTwo-Level. Ref MB ST 2 Rev B. LDR Spine USA","author":"LDR Spine","year":"2013","unstructured":"LDR SpineUSA. Mobi-C Cervical Disc Surgical Technique: \u00adTwo-Level. Ref MB ST 2 Rev B. LDR Spine USA; 2013."},{"issue":"6","key":"bib4","series-title":"J Neurosurg Spine","first-page":"727","article-title":"Mechanical failure of the Mobi-C implant for artificial cervical disc replacement: report of 4 cases","volume":"33","author":"DiCesare","year":"2020","unstructured":"DiCesare JATTucker AMSay IMechanical failure of the Mobi-C implant for artificial cervical disc replacement: report of 4 cases. J Neurosurg Spine. 2020;33(6):727-733. doi:10.3171\/2020.5.SPINE19442"},{"issue":"4","key":"bib5","series-title":"Br J Neurosurg","first-page":"520","article-title":"Spinal cord compression due to nucleus migration from Mobi-C total disc replacement","volume":"36","author":"Pitsika","year":"2022","unstructured":"Pitsika MNissen J.Spinal cord compression due to nucleus migration from Mobi-C total disc replacement. 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Eur Spine J. 2015;24(suppl 4):S494-S501. doi:10.1007\/s00586-014-3535-0"}],"container-title":["Journal of Neurosurgery: Case Lessons"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/12\/16\/article-CASE26740.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/12\/16\/article-CASE26740.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/12\/16\/article-CASE26740.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T00:01:07Z","timestamp":1792540867000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/12\/16\/article-CASE26740.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,10,19]]},"references-count":9,"journal-issue":{"issue":"16"},"URL":"https:\/\/doi.org\/10.3171\/case26740","relation":{},"ISSN":["2694-1902"],"issn-type":[{"value":"2694-1902","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,10,19]]}}}