| Evaluation of cervical laminectomy and laminoplasty. A longitudinal study in the goat model. | |
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MedLine Citation:
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PMID: 10404568 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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STUDY DESIGN: An evaluation of the longitudinal radiologic changes up to 6 months induced by multilevel laminectomy and laminoplasty and the biomechanical responses in the goat model, complemented by biomechanical studies of intact specimens. OBJECTIVES: To determine the long-term radiographic differences and biomechanical responses of laminectomy and laminoplasty in an in vivo animal model. SUMMARY OF BACKGROUND DATA: Previous clinical and laboratory studies have indicated that multilevel laminectomy can cause increased flexibility in the cervical spinal column. Although the potential for laminoplasty to resolve these changes has been suggested, other evaluations have not supported this contention. Clarification of this controversy with long-term in vivo studies has not been performed. METHODS: Ten adult goats were divided into two groups, one undergoing C3-C5 laminectomy and the other open-door laminoplasty. Lateral cervical spine radiographs were obtained at 4-week intervals for a 6-month period. After the goats were killed, biomechanical testing was performed using pure moment loading on the surgically treated specimens and on three intact (without surgery) cervical spinal columns. RESULTS: In the laminectomy preparations, the cervical curvature index was noted to decrease by 59% at 16 weeks (P < 0.028) and by 70% at 24 weeks (P < 0.002), whereas the decrease in laminoplasty was not significantly different. Biomechanical testing indicated a significantly increased sagittal-plane slack motion in the laminectomy group (55 degrees) compared with that in intact specimens (39 degrees), but no significant difference between the laminoplasty and intact groups with respect to this motion. Laminectomy was found to be significantly stiffer (36%) in flexion than in extension, whereas the contrary was true for laminoplasty (37%). CONCLUSIONS: Radiographic and biomechanical results in the goat model suggest that laminoplasty is superior to laminectomy in maintaining cervical alignment and preventing postoperative spinal deformities. |
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Authors:
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J Baisden; L M Voo; J F Cusick; F A Pintar; N Yoganandan |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Spine Volume: 24 ISSN: 0362-2436 ISO Abbreviation: Spine Publication Date: 1999 Jul |
Date Detail:
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Created Date: 1999-09-14 Completed Date: 1999-09-14 Revised Date: 2009-07-09 |
Medline Journal Info:
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Nlm Unique ID: 7610646 Medline TA: Spine (Phila Pa 1976) Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1283-8; discussion 1288-9 Citation Subset: IM |
Affiliation:
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Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biomechanics Cervical Vertebrae / physiology, radiography, surgery* Follow-Up Studies Goats* Laminectomy* Range of Motion, Articular Spinal Curvatures / radiography Spinal Fusion* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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