Computed Tomographic Analysis of Ventral Atlantoaxial Optimal Safe Implantation Corridors in 27 Dogs

Guillaume Leblond; Luis Gaitero; Noel M. M. Moens; Alex zur Linden; Fiona M.K. James; Gabrielle J. Monteith; John Runciman

doi:10.3415/VCOT-17-03-0046

Veterinary and Comparative Orthopaedics and Traumatology, Inhaltsverzeichnis

Vet Comp Orthop Traumatol 2017; 30(06): 413-423
DOI: 10.3415/VCOT-17-03-0046

Original Research

Schattauer GmbH

Computed Tomographic Analysis of Ventral Atlantoaxial Optimal Safe Implantation Corridors in 27 Dogs

Authors

Guillaume Leblond

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Luis Gaitero

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Noel M. M. Moens

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Alex zur Linden

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Fiona M.K. James

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
Gabrielle J. Monteith

¹Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
John Runciman

²School of Engineering, University of Guelph, Guelph, Ontario, Canada

Abstract

Objectives Ventral atlantoaxial stabilization techniques are challenging surgical procedures in dogs. Available surgical guidelines are based upon subjective anatomical landmarks, and limited radiographic and computed tomographic data. The aims of this study were (1) to provide detailed anatomical descriptions of atlantoaxial optimal safe implantation corridors to generate objective recommendations for optimal implant placements and (2) to compare anatomical data obtained in non-affected Toy breed dogs, affected Toy breed dogs suffering from atlantoaxial instability and non-affected Beagle dogs.

Methods Anatomical data were collected from a prospectively recruited population of 27 dogs using a previously validated method of optimal safe implantation corridor analysis using computed tomographic images.

Results Optimal implant positions and three-dimensional numerical data were generated successfully in all cases. Anatomical landmarks could be used to generate objective definitions of optimal insertion points which were applicable across all three groups. Overall the geometrical distribution of all implant sites was similar in all three groups with a few exceptions.

Clinical Significance This study provides extensive anatomical data available to facilitate surgical planning of implant placement for atlantoaxial stabilization. Our data suggest that non-affected Toy breed dogs and non-affected Beagle dogs constitute reasonable research models to study atlantoaxial stabilization constructs.

Keywords

canine - atlantoaxial - atlantoaxial instability - computed tomography - neurosurgery

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Referenzen

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