title: Biomechanical comparison after in vitro laminar vertebral stabilization and vertebral body plating of the first and second lumbar vertebrae in specimens obtained from canine cadavers.
abstract: OBJECTIVE
  To compare biomechanical characteristics of vertebral segments after vertebral body plating or laminar stabilization following complete incision of the annulus fibrosus.
  
  
  METHODS
  Vertebral segments from T13 through L3 obtained from 18 canine cadavers.
  
  
  METHODS
  A 4-point bending moment was applied in flexion and extension to the intact vertebral segments to determine a baseline range of motion (ROM) and neutral zone (NZ). Vertebral columns were then destabilized by creating a defect in the intervertebral disk via complete incision of the ventral aspect of the annulus fibrosus. The bending moment was applied again after stabilization was accomplished via vertebral body plating or with laminar stabilization (n = 9 vertebral segments/stabilization technique). The ROM and NZ were compared with their baseline values and among treatment groups. Finally, load-to-failure testing was performed in flexion.
  
  
  RESULTS
  Mean relative ROM and NZ for segments treated with laminar stabilization were significantly lower than those for segments treated with vertebral plates.
  
  
  CONCLUSIONS
  Analysis of in vitro results suggested that laminar stabilization of vertebral segments provided greater stiffness than did vertebral body plating.
authors: Department of Small Animal Surgery, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland. sknell@vetclinics.uzh.ch
authors: Sebastian C
authors: SC
authors: Knell
authors: Alexander
authors: A
authors: Bürki
authors: Karin
authors: K
authors: Hurter
authors: Stephen J
authors: SJ
authors: Ferguson
authors: Pierre M
authors: PM
authors: Montavon
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002102:Cadaver; D004285:Dogs / Q000293:injuries / Q000601:surgery*; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D007403:Intervertebral Disc / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000293:injuries / Q000601:surgery*; D016059:Range of Motion, Articular