Japanese Journal of Veterinary Research;Volume 64 Number 2

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Surgical stabilization of the atlanto-occipital overlap with atlanto-axial instability in a dog

Fujita, Atsushi;Nishimura, Ryohei

Permalink : http://hdl.handle.net/2115/62214
JaLCDOI : 10.14943/jjvr.64.2.141
KEYWORDS : Atlanto-axial instability;Atlanto-occipital overlap;dog

Abstract

The atlanto-occipital (AO) overlap in combination with atlanto-axial (AA) instability was found in a dog. We hypothesized that ventral fixation of the AA junction can stabilize the atlas and prevent AO overlap by reviewing our past cases with AA instability. A standard ventral fixation of the AA junction using stainless k-wires and polymethyl methacrylate (PMMA) was performed. The dog fully recovered, and no complication was noted. The results of the postoperative CT imaging supported our hypothesis. The ventral fixation of the AA junction is a feasible treatment option for similar cases, although craniocervical junction abnormalities (CJA) including AA instability are varied, and careful consideration is required for each case.

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