Funding Source: Firestone Research Endowment, administered by the Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University.
EFFECTS OF PELVIC POSITIONING AND SIMULATED DORSAL ACETABULAR RIM REMODELING ON THE RADIOGRAPHIC SHAPE OF THE DORSAL ACETABULAR EDGE
Article first published online: 22 DEC 2006
Veterinary Radiology & Ultrasound
Volume 48, Issue 1, pages 8–13, January–February 2007
How to Cite
THOMPSON, R., ROE, S. C. and ROBERTSON, I. D. (2007), EFFECTS OF PELVIC POSITIONING AND SIMULATED DORSAL ACETABULAR RIM REMODELING ON THE RADIOGRAPHIC SHAPE OF THE DORSAL ACETABULAR EDGE. Veterinary Radiology & Ultrasound, 48: 8–13. doi: 10.1111/j.1740-8261.2007.00196.x
- Issue published online: 22 DEC 2006
- Article first published online: 22 DEC 2006
- Received July 11, 2006; accepted for publication August 12, 2006.
- canine hip dysplasia;
- defect area;
- dorsal acetabular edge;
- dorsal acetabular rim;
- pelvic rotation
A radiographic study was conducted to evaluate the effect of pelvic rotation and of simulated dorsal acetabular rim (DAR) remodeling on the radiographic appearance of the dorsal acetabular edge (DAE). The DAE is the line connecting the cranial and caudal rims of the acetabulum when viewing a pelvic radiograph made with the dog in the ventrodorsal position with the hind limbs extended. In this study, it was hypothesized that the DAE would change with pelvic rotation and simulated DAR damage. Ventrodorsal radiographs of eight canine pelves were made at 0°, 5°, and 10° of left and right pelvic rotation over its longitudinal axis. These radiographs were repeated following removal of 2, 4, and then 6 mm of bone from the right DAR of each pelvis. The ratio of acetabular width to maximum depth of the DAE was calculated. The area between the DAE and a straight line connecting the cranial and caudal acetabular rims was measured digitally. The DAE depth and area changed with pelvic rotation, and with increasing simulated DAR damage. A linear relationship between the obturator foramina width ratio and pelvic rotation allowed estimation of the degree and direction of pelvic rotation. Equations were developed from the data to assist with the estimation of the amount of DAR remodeling on a clinical radiograph.