Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
ISSN-L : 0916-7250
Surgery
Influence of ventral fixation techniques on atlantoaxial joint fusion in canine models with dens partial resection
Fumitaka TAKAHASHITakaharu HAKOZAKINobuo KANNOShuji SUZUKIYasuji HARADASatoshi SOETAShinichi NAKAMURAShinya YAMAGUCHIYasushi HARA
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JOURNAL OPEN ACCESS

2022 Volume 84 Issue 5 Pages 694-699

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Abstract

We evaluated the completeness of bony fusion of the atlantoaxial joint (AAJ) through polymethylmethacrylate fixation (PMF) and atlantoaxial plate fixation (APF) using six canine models with dens partial resection. In both groups, the hydroxyapatite content at the AAJ was measured up to 7 months postoperatively using quantitative computed tomography. Histological assessment revealed fibrous fusion in the PMF group. Meanwhile, in the APF group, only one dog achieved fibrous fusion, whereas the remaining three showed bony fusion. To our knowledge, this study was the first to evaluate AAJ fusion histologically after PMF and APF. The present study demonstrates that PMF and APF may stabilize the AAJ without clinical complications. Therefore, PMF and APF are clinically useful fixation methods for atlantoaxial instability.

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