Cortex of the pedicle of the vertebral arch.: Part 1

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dc.authoridInceoglu, Serkan/0000-0001-7605-8987
dc.authorwosidKILINÇER, Cumhur/C-7969-2014
dc.authorwosidInceoglu, Serkan/D-5013-2013
dc.contributor.authorInceoglu, Serkan
dc.contributor.authorKilincer, Cumhur
dc.contributor.authorTami, Andrea
dc.contributor.authorMclain, Robert F.
dc.date.accessioned2024-06-12T10:58:38Z
dc.date.available2024-06-12T10:58:38Z
dc.date.issued2007
dc.departmentTrakya Üniversitesien_US
dc.description.abstractObject. Elastic deformation has been proposed as a mechanism by which vertebral pedicles can maintain pullout strength when conical screws are backed out from full insertion. The response to the insertion technique may influence both the extent of deformation and the risk of acute fracture during screw placement. The aim of this study was to determine the deformation characteristics of the lumbar pedicle cortex during screw placement. Methods. Lumbar pedicles with linear strain gauges attached at the lateral and medial cortices were instrumented using 7.5-mm pedicle screws with or without preconditioning by insertion and removal of 6.5-mm screws. The strains and elastic recoveries of the medial and lateral cortices were determined. Results. Mean medial wall strains tended to be lower than mean lateral wall strains when the 6.5-mm and 7.5-mm screw data were pooled (p = 0.07). After the screws had been removed, 71 to 79% of the deformation at the lateral cortex and 70 to 96% of the deformation at the medial cortex recovered. When inserted first, the 7.5-mm screw caused more plastic deformation at the cortex than it did when inserted after the 6.5-mm screw. Occasional idiosyncratic strain patterns were observed. No gross fracture was observed during screw placement. Conclusions. Screw insertion generated plastic deformation at the pedicle cortex even though the screw did not directly contact the cortex. The lateral and medial cortices responded differently to screw insertion. The technique of screw insertion affected the deformation behavior of the lumbar pedicles. With myriad options for screw selection and placement available, further study is needed before optimal placement parameters can be verified.en_US
dc.identifier.endpage346en_US
dc.identifier.issn1547-5654
dc.identifier.issue3en_US
dc.identifier.pmid17877271en_US
dc.identifier.startpage341en_US
dc.identifier.urihttps://hdl.handle.net/20.500.14551/20145
dc.identifier.volume7en_US
dc.identifier.wosWOS:000249219700014en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherAmer Assoc Neurological Surgeonsen_US
dc.relation.ispartofJournal Of Neurosurgery-Spineen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCortical Boneen_US
dc.subjectPedicle Cortexen_US
dc.subjectPedicle Expansionen_US
dc.subjectPedicle Screwen_US
dc.subjectStrain Gaugeen_US
dc.subjectCancellous Boneen_US
dc.subjectThoracic Spineen_US
dc.subjectFixationen_US
dc.subjectLumbaren_US
dc.subjectArchitectureen_US
dc.subjectPlacementen_US
dc.subjectStrengthen_US
dc.titleCortex of the pedicle of the vertebral arch.: Part 1en_US
dc.typeArticleen_US

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