Biomechanical evaluation of three ventral fixation methods for canine atlantoaxial instability: a cadaveric study.
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.
The Laboratory of Veterinary Surgery, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-0023, Japan.
Fumitaka
F
Takahashi
Takaharu
T
Hakozaki
Nobuo
N
Kanno
Yasuji
Y
Harada
Shinya
S
Yamaguchi
Yasushi
Y
Hara
D000818:Animals; D001268:Atlanto-Axial Joint / Q000601:surgery*; D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D004285:Dogs; D005260:Female; D007593:Joint Instability / Q000601:surgery*; D008297:Male; D019904:Polymethyl Methacrylate; D016059:Range of Motion, Articular
D019904:Polymethyl Methacrylate