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dc.contributor.authorCrist, Brett D.-
dc.contributor.authorPfeiffer, Ferris M.-
dc.contributor.authorKhazzam, Michael S.-
dc.contributor.authorKueny, Rebecca A.-
dc.contributor.authorDella Rocca, Gregory J.-
dc.contributor.authorCarson, William L.-
dc.date.accessioned2019-02-06T09:36:24Z-
dc.date.available2019-02-06T09:36:24Z-
dc.date.issued2018-07-10-
dc.identifier.citationJournal of Orthopaedic Translation (16): - (2019) 102-111de_DE
dc.identifier.issn2214-031Xde_DE
dc.identifier.urihttps://tubdok.tub.tuhh.de/handle/11420/1747-
dc.description.abstractBackground: Pelvic ringecomminuted transforaminal sacral fracture injuries are rotationally and vertically unstable and have a high rate of failure. Objective: Our study purpose was to use three-dimensional (3D) optical tracking to detect onset location of boneeimplant interface failure and measure the distances and angles between screws and line of applied force for correlation to strength of pelvic fracture fixation techniques. Methods: 3D relative motion across sacralerami fractures and screws relative to bone was measured with an optical tracking system. Synthetic pelves were used. Comminuted transforaminal sacralerami fractures were modelled. Each pelvis was stabilised by either (1) two iliosacral screws in S1, (2) one transsacral screw in S1 and one iliosacral screw in S1 and (3) one trans-alar screw in S1 and one iliosacral screw in S1; groups 4e6 consisted of fixation groups with addition of anterior inferior iliac pelvic external fixator. Eighteen-instrumented pelvic models with right ilium fixed simulate single-leg stance. Load was applied to centre of S1 superior endplate. Five cycles of torque was initially applied, sequentially increased until permanent deformation occurred. Five cycles of axial load compression was next applied, sequentially increased until permanent deformation occurred, followed by axial loading to catastrophic failure. A Student t test was used to determine significance (p < 0.05). Results: The model, protocol and 3D optical system have the ability to locate how subcatastrophic failures initiate. Our results indicate failure of all screw-based constructs is due to localised bone failure (screw pull-in push-out at the ipsilateral iliumescrew interface, not in sacrum); thus, no difference was observed when not supplemented with external fixation. Conclusion: Inclusion of external fixation improved resistance only to torsional loading. Translational Potential of this Article: Patients with comminuted transforaminal sacral eipsilateral rami fractures benefit from this fixation.en
dc.language.isoende_DE
dc.publisherElsevierde_DE
dc.relation.ispartofJournal of orthopaedic translationde_DE
dc.rightsinfo:eu-repo/semantics/openAccessde_DE
dc.subjectboneeimplant failurede_DE
dc.subjectexternal fixatorde_DE
dc.subjectfracture stabilisationde_DE
dc.subjectpelvic ring injuryde_DE
dc.subjectpelvic screwsde_DE
dc.subjecttransforaminal sacral fracturede_DE
dc.subject.ddc570: Biowissenschaften, Biologiede_DE
dc.subject.ddc620: Ingenieurwissenschaftende_DE
dc.titleBiomechanical evaluation of location and mode of failure in three screw fixations for a comminuted transforaminal sacral fracture modelde_DE
dc.typeArticlede_DE
dc.identifier.urnurn:nbn:de:gbv:830-88222600-
dc.identifier.doi10.15480/882.1744-
dc.type.diniarticle-
dc.subject.ddccode570-
dc.subject.ddccode620-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:gbv:830-88222600de_DE
tuhh.oai.showtruede_DE
dc.identifier.hdl11420/1747-
tuhh.abstract.englishBackground: Pelvic ringecomminuted transforaminal sacral fracture injuries are rotationally and vertically unstable and have a high rate of failure. Objective: Our study purpose was to use three-dimensional (3D) optical tracking to detect onset location of boneeimplant interface failure and measure the distances and angles between screws and line of applied force for correlation to strength of pelvic fracture fixation techniques. Methods: 3D relative motion across sacralerami fractures and screws relative to bone was measured with an optical tracking system. Synthetic pelves were used. Comminuted transforaminal sacralerami fractures were modelled. Each pelvis was stabilised by either (1) two iliosacral screws in S1, (2) one transsacral screw in S1 and one iliosacral screw in S1 and (3) one trans-alar screw in S1 and one iliosacral screw in S1; groups 4e6 consisted of fixation groups with addition of anterior inferior iliac pelvic external fixator. Eighteen-instrumented pelvic models with right ilium fixed simulate single-leg stance. Load was applied to centre of S1 superior endplate. Five cycles of torque was initially applied, sequentially increased until permanent deformation occurred. Five cycles of axial load compression was next applied, sequentially increased until permanent deformation occurred, followed by axial loading to catastrophic failure. A Student t test was used to determine significance (p < 0.05). Results: The model, protocol and 3D optical system have the ability to locate how subcatastrophic failures initiate. Our results indicate failure of all screw-based constructs is due to localised bone failure (screw pull-in push-out at the ipsilateral iliumescrew interface, not in sacrum); thus, no difference was observed when not supplemented with external fixation. Conclusion: Inclusion of external fixation improved resistance only to torsional loading. Translational Potential of this Article: Patients with comminuted transforaminal sacral eipsilateral rami fractures benefit from this fixation.de_DE
tuhh.publisher.doi10.1016/j.jot.2018.06.005-
tuhh.publication.instituteBiomechanik M-3de_DE
tuhh.identifier.doi10.15480/882.1744-
tuhh.type.opus(wissenschaftlicher) Artikelde
tuhh.institute.germanBiomechanik M-3de
tuhh.institute.englishBiomechanik M-3de_DE
tuhh.gvk.hasppnfalse-
tuhh.hasurnfalse-
openaire.rightsinfo:eu-repo/semantics/openAccessde_DE
dc.type.driverarticle-
dc.rights.ccby-nc-ndde_DE
dc.rights.ccversion4.0de_DE
dc.type.casraiJournal Articleen
tuhh.container.volume16de_DE
tuhh.container.startpage102de_DE
tuhh.container.endpage111de_DE
dc.rights.nationallicensefalsede_DE
item.fulltextWith Fulltext-
item.creatorGNDCrist, Brett D.-
item.creatorGNDPfeiffer, Ferris M.-
item.creatorGNDKhazzam, Michael S.-
item.creatorGNDKueny, Rebecca A.-
item.creatorGNDDella Rocca, Gregory J.-
item.creatorGNDCarson, William L.-
item.creatorOrcidCrist, Brett D.-
item.creatorOrcidPfeiffer, Ferris M.-
item.creatorOrcidKhazzam, Michael S.-
item.creatorOrcidKueny, Rebecca A.-
item.creatorOrcidDella Rocca, Gregory J.-
item.creatorOrcidCarson, William L.-
item.grantfulltextopen-
crisitem.author.orcid0000-0001-6266-2892-
crisitem.author.orcid0000-0003-1981-1375-
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