Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/19217
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dc.contributor.authorFaundez, A. A.en
dc.contributor.authorMehbod, A. A.en
dc.contributor.authorWu, C.en
dc.contributor.authorWu, W.en
dc.contributor.authorPloumis, A.en
dc.contributor.authorTransfeldt, E. E.en
dc.date.accessioned2015-11-24T18:57:52Z-
dc.date.available2015-11-24T18:57:52Z-
dc.identifier.issn1536-0652-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/19217-
dc.rightsDefault Licence-
dc.subjectAgeden
dc.subjectBiomechanicsen
dc.subject*Bone Screwsen
dc.subjectFemaleen
dc.subjectHumansen
dc.subjectImaging, Three-Dimensionalen
dc.subjectLordosis/*surgeryen
dc.subjectLumbar Vertebrae/*surgeryen
dc.subjectMaleen
dc.subjectMiddle Ageden
dc.subjectSpinal Fusion/instrumentation/*methodsen
dc.subjectTreatment Outcomeen
dc.titlePosition of interbody spacer in transforaminal lumbar interbody fusion: effect on 3-dimensional stability and sagittal lumbar contouren
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primary10.1097/BSD.0b013e318074bb7d-
heal.identifier.secondaryhttp://www.ncbi.nlm.nih.gov/pubmed/18458586-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικήςel
heal.publicationDate2008-
heal.abstractSTUDY DESIGN: Biomechanical study. OBJECTIVE: To test 2 different intervertebral positions of a semilunar cage and their effects on 3-dimensional stability and segmental lordosis in a model of transforaminal lumbar interbody fusion (TLIF). SUMMARY OF BACKGROUND DATA: In his original TLIF description, Harms recommended decortication of endplates, followed by placement of mesh cages in the middle-posterior intervertebral third. Subsequent studies presented conflicting recommendations: anterior placement of the spacer-cage for better load-sharing versus placement on the stronger posterolateral endplate regions. METHODS: Six human lumbar spinal functional units were first tested intact. TLIF was performed using a semilunar poly-ether-ether-ketone cage randomly inserted in the anterior (TLIF-A) or posterior (TLIF-P) disc space. Pedicle screws and rods were added. Unconstrained pure moments in axial-torsion, lateral-bending (LB), and flexion-extension (FE) were applied under 0.05 Hz and +/-5 Nm sinusoidal waveform. Segmental motions were recorded. Range of motion (ROM) and neutral zone (NZ) were calculated. Pairwise comparisons were made using nonparametric Wilcoxon-matched pairs signed rank sum test with statistical significance set at P<0.05. RESULTS: TLIF-A and TLIF-P significantly decreased ROM (P<0.05) of the intact spinal functional unit, in FE and LB. In axial-torsion, decrease of ROM after TLIF procedures was not significant (P>0.05). Delta-ROM between TLIF-A and TLIF-P was not significant (P>0.05). TLIF-A and TLIF-P significantly decreased NZ in LB (P<0.05). In FE, TLIF-P significantly decreased NZ (P<0.05); TLIF-A showed a trend toward significance (P=0.09). Delta-NZ between TLIF-A and TLIF-P was not significant (P>0.05). Segmental lordosis of TLIF-A and TLIF-P on C-arm views showed angle differences within the range of measurement error of Cobb angles. CONCLUSIONS: Difference in ROM and NZ between anterior (TLIF-A) or posterior (TLIF-P) positions was not statistically significant. Similarly, both positions did not influence segmental lordosis.en
heal.journalNameJ Spinal Disord Techen
heal.journalTypepeer-reviewed-
heal.fullTextAvailabilityTRUE-
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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