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Article: Flexion-distraction injuries in the thoracolumbar spine: An in vitro study of the relation between flexion angle and the motion axis of fracture

TitleFlexion-distraction injuries in the thoracolumbar spine: An in vitro study of the relation between flexion angle and the motion axis of fracture
Authors
KeywordsBiomechanics
Distraction injury
Flexion
In vitro study
Thoracolumbar spine
Issue Date2002
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.jspinaldisorders-tech.com
Citation
Journal Of Spinal Disorders, 2002, v. 15 n. 2, p. 139-143 How to Cite?
AbstractA new concept, the motion axis of fracture (MAF), which is defined as the transitional point from anterior compressive to posterior splitting failure on a lateral radiograph, has provided a true understanding of the mechanisms of flexion-distraction injuries in clinical cases. This study was designed to produce in vitro injuries that have MAFs and to clarify the relation between the flexion angle and the MAF location. Adolescent porcine thoracolumbar spines were exposed to a vertical compressive load to failure at three different flexion angles and then examined radiographically. The MAF location was recorded as the distance from the anterior border to the MAF expressed as a percentage of the anteroposterior diameter of the vertebral body. All specimens showed similar injuries, with MAFs consisting of anterior compression fractures in the vertebral bodies and posterior disruptions. A significant negative correlation emerged between the flexion angle and the MAF location (r = -0.890; p < 0.0001). These results suggest that even a vertical compressive load contributes to the production of a flexion-distraction injury with an MAF in the thoracolumbar spine. They also indicate that the flexion angle of the spine at which the vertical compressive load is applied is an important factor in determining the MAF location; that is, the larger the flexion angle, the more anterior the MAF.
Persistent Identifierhttp://hdl.handle.net/10722/79543
ISSN
2001 Impact Factor: 0.742
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHoshikawa, Ten_HK
dc.contributor.authorTanaka, Yen_HK
dc.contributor.authorKokubun, Sen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorLuk, KDKen_HK
dc.contributor.authorLeong, JCYen_HK
dc.date.accessioned2010-09-06T07:55:51Z-
dc.date.available2010-09-06T07:55:51Z-
dc.date.issued2002en_HK
dc.identifier.citationJournal Of Spinal Disorders, 2002, v. 15 n. 2, p. 139-143en_HK
dc.identifier.issn0895-0385en_HK
dc.identifier.urihttp://hdl.handle.net/10722/79543-
dc.description.abstractA new concept, the motion axis of fracture (MAF), which is defined as the transitional point from anterior compressive to posterior splitting failure on a lateral radiograph, has provided a true understanding of the mechanisms of flexion-distraction injuries in clinical cases. This study was designed to produce in vitro injuries that have MAFs and to clarify the relation between the flexion angle and the MAF location. Adolescent porcine thoracolumbar spines were exposed to a vertical compressive load to failure at three different flexion angles and then examined radiographically. The MAF location was recorded as the distance from the anterior border to the MAF expressed as a percentage of the anteroposterior diameter of the vertebral body. All specimens showed similar injuries, with MAFs consisting of anterior compression fractures in the vertebral bodies and posterior disruptions. A significant negative correlation emerged between the flexion angle and the MAF location (r = -0.890; p < 0.0001). These results suggest that even a vertical compressive load contributes to the production of a flexion-distraction injury with an MAF in the thoracolumbar spine. They also indicate that the flexion angle of the spine at which the vertical compressive load is applied is an important factor in determining the MAF location; that is, the larger the flexion angle, the more anterior the MAF.en_HK
dc.languageengen_HK
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.jspinaldisorders-tech.comen_HK
dc.relation.ispartofJournal of Spinal Disordersen_HK
dc.rightsJournal of Spinal Disorders & Techniques. Copyright © Lippincott Williams & Wilkins.en_HK
dc.subjectBiomechanicsen_HK
dc.subjectDistraction injuryen_HK
dc.subjectFlexionen_HK
dc.subjectIn vitro studyen_HK
dc.subjectThoracolumbar spineen_HK
dc.titleFlexion-distraction injuries in the thoracolumbar spine: An in vitro study of the relation between flexion angle and the motion axis of fractureen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1536-0652&volume=15&issue=2&spage=139&epage=143&date=2002&atitle=Flexion-distraction+injuries+in+the+thoracolumbar+spine:+an+in+vitro+study+of+the+relation+between+flexion+angle+and+the+motion+axis+of+fractureen_HK
dc.identifier.emailLu, WW:wwlu@hku.hken_HK
dc.identifier.emailLuk, KDK:hcm21000@hku.hken_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid11927823-
dc.identifier.scopuseid_2-s2.0-0036215337en_HK
dc.identifier.hkuros71321en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036215337&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume15en_HK
dc.identifier.issue2en_HK
dc.identifier.spage139en_HK
dc.identifier.epage143en_HK
dc.identifier.isiWOS:000174847800008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHoshikawa, T=36964745700en_HK
dc.identifier.scopusauthoridTanaka, Y=36109332800en_HK
dc.identifier.scopusauthoridKokubun, S=7102279305en_HK
dc.identifier.scopusauthoridLu, WW=7404215221en_HK
dc.identifier.scopusauthoridLuk, KDK=7201921573en_HK
dc.identifier.scopusauthoridLeong, JCY=35560782200en_HK

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