Occurrence and Clinical Significance of a "New Type" Of Metaphyseal Irregularities in the Radius and Ulna in 54 Growing Newfoundland Dogs
Norwegian School of Veterinary Science, Department of Small Animal Clinical Science
The study includes 118 dogs born in Norway. Metaphyseal irregularities radiographically characterized by islands of reduced opacity outlined by thickened, radio-opaque osseous trabeculae, which were aligned with the axis of stress, were present in 45.8 % dogs. The changes were most prominent and always present at 6 months, and were graded mild, moderate and severe.
Materials & Methods
The dogs were privately owned and had individual nutrition and environment with no maintenance protocol required by the project leaders. The dogs were scheduled for a veterinary examination at the ages 3,4,6,12,18 and 24 months including a radiograph of the right front limb. Dogs with other known causes of lameness were excluded when comparing lameness between the groups.
The ratio male: female was 1.5: 1. The prevalence of lame dogs in the group with normal and mild changes was 12%, and 22% in the group with moderate and severe changes. The weight tended to follow the severity, with the heaviest dog in the severe group. A significant litter effect was found.
The clinical significance of irregularities seems to be most prominent in the group with moderate and severe changes.