{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T08:36:59Z","timestamp":1790239019043,"version":"4.1.0"},"reference-count":15,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SPI"],"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:sec>\n<jats:title>Object<\/jats:title>\n<jats:p>The objective of this study was to evaluate the biomechanical properties of lateral instrumentation compared with short- and long-segment pedicle screw constructs following an L-1 corpectomy and reconstruction with an expandable cage.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>Eight human cadaveric T10\u2013L4 spines underwent an L-1 corpectomy followed by placement of an expandable cage. The spines then underwent placement of lateral instrumentation consisting of 4 monoaxial screws and 2 rods with 2 cross-connectors, short-segment pedicle screw fixation involving 1 level above and below the corpectomy, and long-segment pedicle screw fixation (2 levels above and below). The order of instrumentation was randomized in the 8 specimens. Testing was conducted for each fixation technique. The spines were tested with a pure moment of 6 Nm in all 6 degrees of freedom (flexion, extension, right and left lateral bending, and right and left axial rotation).<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>In flexion, extension, and left\/right lateral bending, posterior long-segment instrumentation had significantly less motion compared with the intact state. Additionally, posterior long-segment instrumentation was significantly more rigid than short-segment and lateral instrumentation in flexion, extension, and left\/right lateral bending. In axial rotation, the posterior long-segment construct as well as lateral instrumentation were not significantly more rigid than the intact state. The posterior long-segment construct was the most rigid in all 6 degrees of freedom.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>In the setting of highly unstable fractures requiring anterior reconstruction, and involving all 3 columns, long-segment posterior pedicle screw constructs are the most rigid.<\/jats:p><\/jats:sec>","DOI":"10.3171\/2014.6.spine13751","type":"journal-article","created":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T14:21:34Z","timestamp":1406902894000},"page":"577-581","source":"Crossref","is-referenced-by-count":16,"title":["Biomechanical analysis of anterior versus posterior instrumentation following a thoracolumbar corpectomy"],"prefix":"10.3171","volume":"21","author":[{"given":"Stephanus V.","family":"Viljoen","sequence":"first","affiliation":[{"name":"Departments of Neurosurgery,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole A.","family":"DeVries Watson","sequence":"additional","affiliation":[{"name":"Orthopaedics and Rehabilitation,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole M.","family":"Grosland","sequence":"additional","affiliation":[{"name":"Orthopaedics and Rehabilitation,"},{"name":"Biomedical Engineering, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James","family":"Torner","sequence":"additional","affiliation":[{"name":"Preventative Medicine and Environmental Health, The University of Iowa, Iowa City, Iowa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian","family":"Dalm","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick W.","family":"Hitchon","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery,"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"20 Suppl","key":"b1-spine13751","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"2266S","DOI":"10.1097\/00007632-199410151-00003","article-title":"Surgical treatment alternatives for fixation of unstable fractures of the thoracic and lumbar spine. A meta-analysis","volume":"19","author":"Dickman","year":"1994"},{"key":"b2-spine13751","series-title":"J Neurosurg Spine","doi-asserted-by":"publisher","first-page":"116","DOI":"10.3171\/spi.2004.1.1.0116","article-title":"Biomechanical testing of anterior and posterior thoracolumbar instrumentation in the cadaveric spine","volume":"1","author":"Eichholz","year":"2004"},{"key":"b3-spine13751","series-title":"J Bone Joint Surg Am","doi-asserted-by":"publisher","first-page":"1182","DOI":"10.2106\/00004623-198870080-00009","article-title":"Biomechanical analysis of anterior and posterior instrumentation systems after corpectomy. A calf-spine model","volume":"70","author":"Gurr","year":"1988"},{"key":"b4-spine13751","series-title":"J Spinal Disord Tech","doi-asserted-by":"publisher","first-page":"350","DOI":"10.1097\/00024720-200210000-00002","article-title":"In vitro biomechanical studies of an anterior thoracolumbar implant","volume":"15","author":"Hitchon","year":"2002"},{"key":"b5-spine13751","series-title":"Techniques in Spinal Fusion and Stabilization","first-page":"240","article-title":"Transpedicular screw fixation of the thoracic and lumbar spine","author":"Hitchon","year":"1995"},{"key":"b6-spine13751","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"306","DOI":"10.1097\/00007632-200002010-00008","article-title":"Biomechanical studies of a dynamized anterior thoracolumbar implant","volume":"25","author":"Hitchon","year":"2000"},{"key":"b7-spine13751","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"213","DOI":"10.1097\/00007632-199902010-00004","article-title":"Biomechanical studies on two anterior thoracolumbar implants in cadaveric spines","volume":"24","author":"Hitchon","year":"1999"},{"issue":"2 Suppl","key":"b8-spine13751","series-title":"J Neurosurg","first-page":"252","article-title":"In vitro biomechanical analysis of three anterior thoracolumbar implants","volume":"93","author":"Hitchon","year":"2000"},{"key":"b9-spine13751","series-title":"J Neurosurg Spine","doi-asserted-by":"publisher","first-page":"117","DOI":"10.3171\/spi.2006.5.2.117","article-title":"Comparison of anterolateral and posterior approaches in the management of thoracolumbar burst fractures","volume":"5","author":"Hitchon","year":"2006"},{"key":"b10-spine13751","series-title":"J Spinal Disord Tech","doi-asserted-by":"publisher","first-page":"216","DOI":"10.1097\/BSD.0b013e31807a2f61","article-title":"In vitro analysis of anterior and posterior fixation in an experimental unstable burst fracture model","volume":"21","author":"Kallemeier","year":"2008"},{"key":"b11-spine13751","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"788","DOI":"10.1097\/00007632-198411000-00004","article-title":"Burst fractures with neurologic deficits of the thoracolumbar-lumbar spine. Results of anterior decompression and stabilization with anterior instrumentation","volume":"9","author":"Kaneda","year":"1984"},{"key":"b12-spine13751","series-title":"J Bone Joint Surg Am","doi-asserted-by":"publisher","first-page":"69","DOI":"10.2106\/00004623-199701000-00008","article-title":"Anterior decompression and stabilization with the Kaneda device for thoracolumbar burst fractures associated with neurological deficits","volume":"79","author":"Kaneda","year":"1997"},{"key":"b13-spine13751","series-title":"Orthopedics","doi-asserted-by":"publisher","first-page":"673","DOI":"10.3928\/0147-7447-19950701-16","article-title":"Anterior stabilization of thoracolumbar burst fractures using the Kaneda device: a preliminary report","volume":"18","author":"Kirkpatrick","year":"1995"},{"issue":"306","key":"b14-spine13751","series-title":"Clin Orthop Relat Res","first-page":"110","article-title":"Complications of anterior approaches to the thoracolumbar spine. Emphasis on Kaneda instrumentation","author":"McAfee","year":"1994"},{"key":"b15-spine13751","series-title":"J Bone Joint Surg Am","doi-asserted-by":"publisher","first-page":"89","DOI":"10.2106\/00004623-198567010-00012","article-title":"Anterior decompression of traumatic thoracolumbar fractures with incomplete neurological deficit using a retroperitoneal approach","volume":"67","author":"McAfee","year":"1985"}],"container-title":["Journal of Neurosurgery: Spine"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-spine\/21\/4\/article-p577.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-spine\/21\/4\/article-p577.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-spine\/21\/4\/article-p577.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,4,15]],"date-time":"2023-04-15T22:58:54Z","timestamp":1681599534000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-spine\/21\/4\/article-p577.xml"}},"subtitle":["Laboratory investigation"],"short-title":[],"issued":{"date-parts":[[2014,10]]},"references-count":15,"journal-issue":{"issue":"4"},"URL":"https:\/\/doi.org\/10.3171\/2014.6.spine13751","relation":{},"ISSN":["1547-5654"],"issn-type":[{"value":"1547-5654","type":"print"}],"subject":[],"published":{"date-parts":[[2014,10]]}}}