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DC Field | Value | Language |
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dc.contributor.author | Faundez, A. A. | en |
dc.contributor.author | Mehbod, A. A. | en |
dc.contributor.author | Wu, C. | en |
dc.contributor.author | Wu, W. | en |
dc.contributor.author | Ploumis, A. | en |
dc.contributor.author | Transfeldt, E. E. | en |
dc.date.accessioned | 2015-11-24T18:57:52Z | - |
dc.date.available | 2015-11-24T18:57:52Z | - |
dc.identifier.issn | 1536-0652 | - |
dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/19217 | - |
dc.rights | Default Licence | - |
dc.subject | Aged | en |
dc.subject | Biomechanics | en |
dc.subject | *Bone Screws | en |
dc.subject | Female | en |
dc.subject | Humans | en |
dc.subject | Imaging, Three-Dimensional | en |
dc.subject | Lordosis/*surgery | en |
dc.subject | Lumbar Vertebrae/*surgery | en |
dc.subject | Male | en |
dc.subject | Middle Aged | en |
dc.subject | Spinal Fusion/instrumentation/*methods | en |
dc.subject | Treatment Outcome | en |
dc.title | Position of interbody spacer in transforaminal lumbar interbody fusion: effect on 3-dimensional stability and sagittal lumbar contour | en |
heal.type | journalArticle | - |
heal.type.en | Journal article | en |
heal.type.el | Άρθρο Περιοδικού | el |
heal.identifier.primary | 10.1097/BSD.0b013e318074bb7d | - |
heal.identifier.secondary | http://www.ncbi.nlm.nih.gov/pubmed/18458586 | - |
heal.language | en | - |
heal.access | campus | - |
heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής | el |
heal.publicationDate | 2008 | - |
heal.abstract | STUDY 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.journalName | J Spinal Disord Tech | en |
heal.journalType | peer-reviewed | - |
heal.fullTextAvailability | TRUE | - |
Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) - ΙΑΤ |
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