Radiographic Evaluation of Atlas and Axis Anomalies in Toy Breed Dogs With and Without Atlantoaxial Subluxation

Kim, Dong-Wook; Chang, Dongwoo; Kim, Gonhyung

doi:10.21873/invivo.13011

Cited by 1 publication

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study has analyzed the force applied to the atlas by finite element models and documented that a narrow implant close to the midline of the dorsal arch is more vulnerable to fractures than a wide implant applied far from the midline of the dorsal arch (16). In addition to anatomical characteristics that the IO of the atlas generally occurs in the midline of the dorsal arch (12,14), it is recommended to apply the implant far from the midline of the dorsal arch during dorsal stabilization of AAS. Although the present study has a limitation due to its small number of dogs, surgical reduction of AAS by the modified dorsal wiring method might be a more attractive way than ventral fixation when applying the implant to toy breeds with small-sized bones.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Application of a Modified Dorsal Wiring Method in Toy Breed Dogs With Atlantoaxial Subluxation

Kim

Lee²,

Kim

2023

In Vivo

View full text Add to dashboard Cite

Background/Aim: Atlantoaxial subluxation (AAS) is a congenital or traumatic condition that often requires surgical stabilization. Surgery is performed via a ventral or dorsal approach. A ventral approach is challenging in toy breed dogs due to their small-sized bones. Reducing AAS by orthopedic wire via a dorsal approach can cause iatrogenic spinal cord damage. Due to these limitations, a Kishigami atlantoaxial tension band (Kishigami AATB) that remains in the epidural space has been devised. Similar to the Kishigami AATB, the present study developed a modified dorsal wiring method and evaluated it in toy breed dogs with AAS. Materials and Methods: Medical data of toy breed dogs with AAS that underwent surgical stabilization using the modified dorsal wiring method from 2017 to 2020 were retrospectively reviewed. Results: A total of 10 dogs were analyzed. Regarding the history of these dogs, six dogs had congenital AAS, and the remaining four dogs had traumatic AAS. Evaluation via computed tomography was available for five dogs, of which two dogs were identified as having incomplete ossification of their atlas. Although four dogs required a revision surgery because of recurrence of clinical signs or fracture of the atlas, final functional improvement was achieved in nine dogs. One dog showed worsened neurological status that led to death. Conclusion: Clinical results with the modified dorsal wiring method were similar to those with the Kishigami AATB. The modified dorsal wiring method is versatile as it could be applied to various shapes of dogs' atlas.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Dogs with other concurrent diseases that might affect their neurological status were excluded. Incomplete ossification (IO) of the dorsal arch of the atlas was defined according to previous studies (12)(13)(14).…”

Section: Methodsmentioning

confidence: 99%