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Biomechanical evaluation of three ventral fixation methods for canine atlantoaxial instability: a cadaveric study
Fumitaka Takahashi1, Takaharu Hakozaki, Nobuo Kanno
1The Laboratory of Veterinary Surgery, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-0023, Japan.
Abstract:
We evaluated comparatively the mechanical strength in three kinds of surgical fixation techniques for canine atlantoaxial joint. Atlantoaxial plate fixation (APF), polymethylmethacrylate (PMMA) fixation (PMF) and transarticular fixation (TAF) were applied to the atlas and axis harvested from healthy beagle dogs, and then, the specimens were tested. The PMF group had significantly higher resistance to flexion than the APF group (P=0.030) and the TAF group (P=0.004). There were no significant differences in resistance to torsion between the APF group and the PMF group, while the APF group had significantly higher resistance to torsion than the TAF group (P=0.037). Considering the possible drawbacks of using PMMA, the APF method is proposed as an alternative to the PMF method.
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