| Biomechanical evaluation of posterior thoracic transpedicular discectomy. | |
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MedLine Citation:
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PMID: 20672963 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECT: The authors investigated the biomechanical properties of transpedicular discectomy in the thoracic spine and compared the effects on spinal stability of a partial and total facetectomy. METHODS: Human thoracic specimens were tested while intact, after a transpedicular discectomy with partial facetectomy, and after an additional total facetectomy was incorporated. Nonconstraining pure moments were applied under load control (maximum 7.5 Nm) to induce flexion, extension, lateral bending, and axial rotation while spinal motion was measured at T8-9 optoelectronically. The range of motion (ROM) and lax zone were determined in each specimen and compared among conditions. RESULTS: Transpedicular discectomy with and without a total facetectomy significantly increased the ROM and lax zone in all directions of loading compared with the intact spine (p < 0.008). The segmental increase in ROM observed with the transpedicular discectomy was 25%. The additional total facetectomy created an insignificant 3% further increase in ROM compared with medial facetectomy (p > 0.2). CONCLUSIONS: Transpedicular discectomy can be performed in the thoracic spine with a modest decrease in stability expected. Because the biomechanical behavior of a total facetectomy is equivalent to that of a medial facetectomy, the additional facet removal may be incorporated without further biomechanical consequences. |
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Authors:
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Fatih Ersay Deniz; Leonardo B C Brasiliense; Bruno C R Lazaro; Phillip M Reyes; Anna G U Sawa; Volker K H Sonntag; Neil R Crawford |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of neurosurgery. Spine Volume: 13 ISSN: 1547-5646 ISO Abbreviation: J Neurosurg Spine Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-02 Completed Date: 2010-08-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101223545 Medline TA: J Neurosurg Spine Country: United States |
Other Details:
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Languages: eng Pagination: 253-9 Citation Subset: IM |
Affiliation:
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Faculty of Medicine, Department of Neurosurgery, Gaziosmanpasa University, Tokat, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Absorptiometry, Photon Adult Biomechanics Bone Density Cadaver Diskectomy / methods* Female Humans Intervertebral Disk / physiology*, surgery* Male Middle Aged Models, Biological Range of Motion, Articular Thoracic Vertebrae / physiology*, radiography, surgery* Weight-Bearing |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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