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Long-term outcome of juvenile pubic symphysiodesis and triple pelvic osteotomy in dogs with hip dysplasia

Paul A. Manley DVM, MSc, DACVS1, William M. Adams DVM, DACVR2, Kelson C. Danielson BS3, R. Tass Dueland DVM, MS, DACVS4, and Kathleen A. Linn DVM, MS, DACVS5
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  • 1 Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706.
  • | 2 Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706.
  • | 3 Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706.
  • | 4 Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706.
  • | 5 Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706.

Abstract

Objective—To compare long-term outcomes of juvenile pubic symphysiodesis (JPS) and triple pelvic osteotomy (TPO) in dogs with hip dysplasia.

Design—Prospective clinical trial.

Animals—18 dogs with hip dysplasia (ie, distraction index ≥ 0.5 in at least 1 hip joint and no, mild, or moderate radiographic evidence of degenerative joint disease [DJD]).

Procedures—Dogs between 4 and 5.5 months old at enrollment were assigned to undergo JPS, and dogs between 5 and 12 months old were assigned to undergo TPO. All dogs were reexamined at 2 years of age.

Results—At 2 years of age, there were no significant differences between groups in regard to lameness scores, angle of extension of the hip joints, distraction index, peak vertical force, acetabular angle, radiographic DJD score, or owner-assigned scores of clinical function. Dorsal acetabular rim angle was significantly higher in dogs that underwent JPS than in dogs that underwent TPO. For dogs that underwent TPO, dorsal acetabular rim angle was significantly decreased and acetabular angle was significantly increased at 2 years of age, compared with values obtained prior to surgery.

Conclusions and Clinical Relevance—Results suggest that JPS and TPO have similar effects on hip joint conformation in dogs with moderate to severe hip dysplasia but that neither procedure eliminates the hip joint laxity characteristic of hip dysplasia or the progression of degenerative changes.

Abstract

Objective—To compare long-term outcomes of juvenile pubic symphysiodesis (JPS) and triple pelvic osteotomy (TPO) in dogs with hip dysplasia.

Design—Prospective clinical trial.

Animals—18 dogs with hip dysplasia (ie, distraction index ≥ 0.5 in at least 1 hip joint and no, mild, or moderate radiographic evidence of degenerative joint disease [DJD]).

Procedures—Dogs between 4 and 5.5 months old at enrollment were assigned to undergo JPS, and dogs between 5 and 12 months old were assigned to undergo TPO. All dogs were reexamined at 2 years of age.

Results—At 2 years of age, there were no significant differences between groups in regard to lameness scores, angle of extension of the hip joints, distraction index, peak vertical force, acetabular angle, radiographic DJD score, or owner-assigned scores of clinical function. Dorsal acetabular rim angle was significantly higher in dogs that underwent JPS than in dogs that underwent TPO. For dogs that underwent TPO, dorsal acetabular rim angle was significantly decreased and acetabular angle was significantly increased at 2 years of age, compared with values obtained prior to surgery.

Conclusions and Clinical Relevance—Results suggest that JPS and TPO have similar effects on hip joint conformation in dogs with moderate to severe hip dysplasia but that neither procedure eliminates the hip joint laxity characteristic of hip dysplasia or the progression of degenerative changes.

Contributor Notes

Supported by the Morris Animal Foundation (project No. D01CA-86).

Address correspondence to Dr. Manley.