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Vet Comp Orthop Traumatol 2010; 23(05): 306-317
DOI: 10.3415/VCOT-09-04-0045
Original Research
Schattauer GmbH

Canine hip dysplasia treated by juvenile pubic symphysiodesis

Part I: Two year results of computed tomography and distraction index
R. T. Dueland
1   Department of Surgical Sciences, University of Wisconsin, Madison, Wisconsin, USA
,
W. M. Adams
1   Department of Surgical Sciences, University of Wisconsin, Madison, Wisconsin, USA
,
A. J. Patricelli
1   Department of Surgical Sciences, University of Wisconsin, Madison, Wisconsin, USA
2   Current address: Breckenridge Animal Clinic Surgical Services, Breckenridge, Colorado, USA
,
K. A. Linn
3   University of Saskatchewan, Saskatoon, Canada
,
P. M. Crump
4   Department of Computing & Biometry, University of Wisconsin, Madison, Wisconsin, USA
› Author Affiliations Financial Support: Supported by the Companion Animal Fund, University of Wisconsin-Madison, Morris Animal Foundation, Englewood CO, and a private Chesapeake Retriever kennel.
Further Information

Publication History

Received: 08 April 2009

Accepted: 01 April 2010

Publication Date:
19 December 2017 (online)

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Summary

Objectives: To measure one and two year effects of juvenile pubic symphysiodesis (JPS) in puppies defined as ‘at-risk’ for canine hip dysplasia (CHD) using the following objective hip conformation criteria: Acetabular angle (AA), dorsal acetabular rim angle (DARA) and hip laxity (PennHIP© distraction index (DI).

Design: Controlled clinical case study. Animals: Thirty-nine dysplastic puppies (six controls).

Procedures: The dogs were anaesthetised and acetabular angle, DARA, and DI values were obtained by computed tomography and radiography preoperatively. Electro-cautery fusion of the pubic symphysis was performed between 12 – 24 weeks of age. The imaging was repeated at one and two years of age.

Results: Significant hip improvements were seen at the two-year follow-up appointments for: AA (JPS dogs 31% increase, control 3%), DARA (JPS 38% decrease, control 15%) and DI (JPS 41% decrease in laxity, controls 20%) for all postoperative versus preoperative values. Pubic fusion occurred with minor morbidity.

Conclusion: Juvenile pubic symphysiodesis resulted in significant improvements in hip conformation (AA and DARA), especially in mild to moderately lax hips (DI = 0.40–0.69). Most dogs with DI ≥0.70 increased in osteoarthritis grade by two years of age.

Clinical relevance: Juvenile pubic symphysiodesis surgery at 12–24 weeks of age significantly improved hip conformation and decreased laxity in at-risk CHD dogs. Early-age (12 to 16 week) recognition of hip laxity offered greater JPS benefits than surgery performed at 19- to 24-weeks-old. Dogs with severe laxity (DI ≥0.70) continued to increase in osteoarthritis. An early (12–16 weeks) positive laxity test (Ortolani) should alert one to obtain objective laxity determinations (Penn-HIP© DI).

Keywords

Canine - hip dysplasia - juvenile pubic symphysiodesis

*Errors stated in the Corrigendum published with issue 6/2010 have been corrected in this version of the article (address listed for 3rd author and Reference 10).


 

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