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Case Reports
. 2024 Nov;14(11):3127-3131.
doi: 10.5455/OVJ.2024.v14.i11.43. Epub 2024 Nov 30.

Temporary circular external fixation for effective management of bilateral radial non-union in a Toy Poodle

Byoungho An  1 , Bokyung Song  1 , Yehyeon Jang  1 , Dongwook Kim  1 , Gonhyung Kim  1
Affiliations
Case Reports

Temporary circular external fixation for effective management of bilateral radial non-union in a Toy Poodle

Byoungho An et al. Open Vet J. 2024 Nov.

Abstract

Background: Distal radius fractures are prevalent in small and toy-breed dogs, presenting significant treatment challenges due to complications such as delayed union or non-union. These complications are often exacerbated by reduced vascular density at the distal diaphyseal-metaphyseal junction of the radius, which is vital for bone healing, particularly in toy and small breed dogs. Circular external fixation (CEF) is known for its effectiveness in managing acute and chronic fractures and providing temporary stabilization in humans. This study documented the use of temporary CEF in a Toy Poodle with non-union fractures of the radius and ulna, addressing bone atrophy and resorption caused by repeated implant failures.

Case description: A 3-year-old, 4.2 kg, neutered male Toy Poodle was referred for treatment after multiple attempts to fix radial and ulnar fractures failed to achieve union over 1 year, leaving the dog barely using its forelimbs. In the first surgery, CEF was applied to heal holes in the bone caused by previous fixation devices and encourage forelimb use through rehabilitation. In the second surgery, a combination of cancellous bone grafting, plate fixation, and CEF was used, resulting in successful bone union and restoration of normal gait after 10 weeks.

Conclusion: In conclusion, CEF is a valuable option for temporary fixation and fracture reduction in toy-breed dogs and offers a promising approach to managing challenging cases.

Keywords: Circular external fixation; Fracture; Non-union; Small animal; Toy-breed dog.

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Conflict of interest statement

The authors declare that there is no conflict of interest.

Figures

Fig. 1.
Fig. 1.. Bilateral radiographs of the radius and ulna, showing osteolytic bone holes at previous screw sites and nonunion at the fracture sites.
Fig. 2.
Fig. 2.. Radiographs taken immediately after the first surgery and 6 weeks postoperatively, showing the effects of temporary circular external fixation on bone remodeling. (A) Immediate postoperative view of right radius and ulna. (B) Immediate postoperative view of left radius and ulna. (C) 6-week postoperative view of right radius and ulna. (D) 6-week postoperative view of left radius and ulna.
Fig. 3.
Fig. 3.. Lateral radiograph of bilateral radius and ulna fracture reduced using circular external fixation along with plate and screw fixation.
Fig. 4.
Fig. 4.. Lateral radiograph 10 weeks after the second surgery showing bone union progression.
See this image and copyright information in PMC

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