Effect of public symphysiodesis on pelvic ...

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Title Effect of public symphysiodesis on pelvic development in the skeletally immature greyhound
Author(s) S. W. Swainson, M. G. Conzemius, E. A. Riedesel, G. K. Smith, Christopher B. Riley
Journal Veterinary Surgery: VS: The Official Journal of the American College of Veterinary Surgeons
Date 2000
Volume 29
Issue 2
Start page 178
End page 190
Abstract OBJECTIVE: To evaluate the effect of pubic symphysiodesis (PS) on pelvic development in skeletally immature dogs. STUDY DESIGN: Prospective randomized clinical trial. ANIMALS: Eight 4 month-old, sexually intact female Greyhounds. METHODS: Initial PS was performed at 4 months of age using a powered stapling device. Because of failure of the initial surgery, a second PS was performed 1 month later by resecting the pubic symphysis with a rongeur followed by placement of handmade bone staples in four dogs. Sham PS was performed in four control dogs at 4 months of age. Pubic growth rate and pelvic development were evaluated using standard plane radiography and computed tomography. Specific measurements included acetabular ventroversion, Norberg angle, lateral center-edge angle, and pelvic inlet dimensions. Hip distraction indices were determined as well. RESULTS: PS at 4 months of age using a stapling device failed. Pubic symphysiodesis using hand made staples was successful at 5 months of age and did not result in any clinically significant intraoperative or postoperative complications. Pubic symphysiodesis markedly decreased pubic symphysis growth in the treatment group. Hip distraction indices and pelvic inlet circumference, area, and width significantly decreased in treated dogs compared to those in the control group. Acetabular ventroversion was significantly increased in treated dogs compared to those in the control group. CONCLUSIONS: PS decreases pelvic canal size, increases acetabular ventroversion, and does not appear to have any clinically significant complications. CLINICAL RELEVANCE: PS performed in skeletally immature dogs with hip dysplasia may provide an effect similar to a triple pelvic osteotomy and warrants further investigation.

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