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Article: Biomechanical evaluation of stiffness of long-segment instrumented spine

TitleBiomechanical evaluation of stiffness of long-segment instrumented spine
Authors
Issue Date2005
Citation
Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae, 2005, v. 27 n. 2, p. 153-155 How to Cite?
AbstractOBJECTIVE: To test the changes of the stiffness of the intact, released, and instrumented spines in an in vitro porcine model. METHODS: Twelve porcine spines (12 segments each) were harvested for the biomechanical tests with Material Test System. Stiffness during flexion, extension, lateral bending, and axial rotation were recorded; then the specimen was released with intervertebral discs and the facet joints removed, followed by repeating the biomechanical tests for stiffness; and finally, a double-rod titanium construct was applied for internal fixation to each released spine and stiffness tests were repeated again. RESULTS: Compared with the intact porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 52.89 +/- 15.98, 105.43 +/- 56.38, 42.09 +/- 14.73, and (16.94 +/- 4.85) N x mm/degrees, respectively], the stiffness of the released porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 44.04 +/- 13.73, 41.46 +/- 10.80, 31.75 +/- 7.23, and (9.10 +/- 2.07)N x mm/degrees, respectively] significantly decreased (P < 0.05), while significantly increased stiffness was found in the instrumented porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 385.96 +/- 143.25, 138.96 +/- 59.41, 152.56 +/- 87.15, and (55.91 +/- 16.49) N x mm/degrees, respectively] (P < 0.05). CONCLUSION: Higher instant stiffness was found in instrumented spine than the intact one during flexion, extension, lateral bending and axial rotation.
Persistent Identifierhttp://hdl.handle.net/10722/170068
ISSN
2015 SCImago Journal Rankings: 0.151

 

DC FieldValueLanguage
dc.contributor.authorZhang, Jen_US
dc.contributor.authorLu, WWen_US
dc.contributor.authorYe, QBen_US
dc.contributor.authorQiu, GXen_US
dc.date.accessioned2012-10-30T06:05:07Z-
dc.date.available2012-10-30T06:05:07Z-
dc.date.issued2005en_US
dc.identifier.citationZhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae, 2005, v. 27 n. 2, p. 153-155en_US
dc.identifier.issn1000-503Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/170068-
dc.description.abstractOBJECTIVE: To test the changes of the stiffness of the intact, released, and instrumented spines in an in vitro porcine model. METHODS: Twelve porcine spines (12 segments each) were harvested for the biomechanical tests with Material Test System. Stiffness during flexion, extension, lateral bending, and axial rotation were recorded; then the specimen was released with intervertebral discs and the facet joints removed, followed by repeating the biomechanical tests for stiffness; and finally, a double-rod titanium construct was applied for internal fixation to each released spine and stiffness tests were repeated again. RESULTS: Compared with the intact porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 52.89 +/- 15.98, 105.43 +/- 56.38, 42.09 +/- 14.73, and (16.94 +/- 4.85) N x mm/degrees, respectively], the stiffness of the released porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 44.04 +/- 13.73, 41.46 +/- 10.80, 31.75 +/- 7.23, and (9.10 +/- 2.07)N x mm/degrees, respectively] significantly decreased (P < 0.05), while significantly increased stiffness was found in the instrumented porcine spines [stiffness during flexion, extension, lateral bending, and axial rotation was 385.96 +/- 143.25, 138.96 +/- 59.41, 152.56 +/- 87.15, and (55.91 +/- 16.49) N x mm/degrees, respectively] (P < 0.05). CONCLUSION: Higher instant stiffness was found in instrumented spine than the intact one during flexion, extension, lateral bending and axial rotation.en_US
dc.languageengen_US
dc.relation.ispartofZhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicaeen_US
dc.subject.meshAnimalsen_US
dc.subject.meshBiomechanicsen_US
dc.subject.meshDiskectomyen_US
dc.subject.meshFracture Fixation, Internalen_US
dc.subject.meshInternal Fixatorsen_US
dc.subject.meshLumbar Vertebrae - Surgeryen_US
dc.subject.meshRange Of Motion, Articular - Physiologyen_US
dc.subject.meshSpinal Fusion - Methodsen_US
dc.subject.meshSpine - Surgeryen_US
dc.subject.meshStress, Mechanicalen_US
dc.subject.meshSwineen_US
dc.subject.meshThoracic Vertebrae - Surgeryen_US
dc.titleBiomechanical evaluation of stiffness of long-segment instrumented spineen_US
dc.typeArticleen_US
dc.identifier.emailLu, WW:wwlu@hku.hken_US
dc.identifier.authorityLu, WW=rp00411en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid15960256-
dc.identifier.scopuseid_2-s2.0-22844444726en_US
dc.identifier.volume27en_US
dc.identifier.issue2en_US
dc.identifier.spage153en_US
dc.identifier.epage155en_US
dc.identifier.scopusauthoridZhang, J=9747044800en_US
dc.identifier.scopusauthoridLu, WW=7404215221en_US
dc.identifier.scopusauthoridYe, QB=7202764815en_US
dc.identifier.scopusauthoridQiu, GX=7103291762en_US

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