Comparative Biomechanical Study of Cervical Spine Stabilisation by Cage Alone, Cage with Plate, or Plate-Cage: A Porcine Model

Purpose. To compare stability and subsidence associated with 3 types of cervical spine stabilisation. Methods. The C3 to C4 vertebrae of 28 Polish pigs were used. Pigs with intact vertebrae (group 1) underwent standard anterior cervical discectomy (group 2), followed by stabilisation using a cage al...

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Bibliographic Details
Published in:Journal of orthopaedic surgery (Hong Kong) 2008-04, Vol.16 (1), p.9-13
Main Authors: Hakalo, J, Pezowicz, C, Wronski, J, Bedzinski, R, Kasprowicz, M
Format: Article
Language:English
Subjects:
Animals
Back surgery
Biomechanical Phenomena
Bone density
Bone Plates
Cervical Vertebrae - physiopathology
Cervical Vertebrae - surgery
Diskectomy
In Vitro Techniques
Internal Fixators
Movement
Spine
Sus scrofa
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Summary:Purpose. To compare stability and subsidence associated with 3 types of cervical spine stabilisation. Methods. The C3 to C4 vertebrae of 28 Polish pigs were used. Pigs with intact vertebrae (group 1) underwent standard anterior cervical discectomy (group 2), followed by stabilisation using a cage alone (group 3), a cage with plate (group 4), or a plate-cage (group 5). Cervical spine stability and subsidence were compared in all 5 groups. Results. Stability was significantly increased after stabilisation by a cage with plate or a plate-cage, but not by a cage alone. The difference between stabilisation by a cage with plate and a plate-cage was not significant. Subsidence was maximal after the cage-alone stabilisation (3.1 mm), being 1.6 mm after the cage-with-plate and plate-cage stabilisations. Conclusion. Additional plating as a supplement to anterior interbody cervical cage stabilisation significantly improves segmental stability and subsidence.
ISSN:1022-5536
2309-4990
DOI:10.1177/230949900801600103