A Retrospective Study of Postoperative Development of Implant-Induced Osteoporosis in Radial-Ulnar Fractures in Toy Breed Dogs Treated with Plate Fixation.

Published on Aug 3, 2021in Veterinary and Comparative Orthopaedics and Traumatology
· DOI :10.1055/s-0041-1731810
Norihiro Muroi1
Estimated H-index: 1
(Nippon Veterinary and Life Science University),
Masakazu Shimada1
Estimated H-index: 1
(Nippon Veterinary and Life Science University)
+ 6 AuthorsYasushi Hara18
Estimated H-index: 18
(Nippon Veterinary and Life Science University)
Objective This study aimed to evaluate implant-induced osteoporosis (IIO) development in toy breed dogs treated using internal fixation with digital radiographs as the index of pixel values. null null null null Study Design There were 226 cases (236 limbs) of toy breed dogs with radial–ulnar fractures. Pixel values were measured on radiographs immediately, 2 weeks and 1 to 12 months after surgery. The ratio of pixel values (PVR) represented the bone mineral areal density based on the humeral condyle in the same image. The dogs were grouped based on the fixation methods, age and status of destabilization. null null null null Results There was a significant decrease in the PVR at 1 to 12 months postoperatively for all cases. There were not any significant differences in PVR of antebrachial fractures between those repaired with plates using locking head screws, cortex screws or a combination of locking and cortex screws. Implant-induced osteoporosis persisted at 1 to 12 months postoperatively in dogs aged ≧6 months, while the PVR increased after 3 months in dogs aged null null null null null Conclusion This study suggests that IIO occurs in small dogs treated with plates and screws. Moreover, patients aged
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