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Short-Term Evaluation of Dorsal Acetabular Augmentation in 10 Canine Total Hip Replacements

Authors

  • Hooman A. Pooya DVM,

    1. From the J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA; Veterinar Chirugische, Kl der Universitat, Zurich, Switzerland; and the Veterinary Specialty Hospital, Rancho Santa Fe, CA.
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  • Kurt S. Schulz DVM, MS, Diplomate ACVS,

    1. From the J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA; Veterinar Chirugische, Kl der Universitat, Zurich, Switzerland; and the Veterinary Specialty Hospital, Rancho Santa Fe, CA.
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  • Eric R. Wisner DVM, Diplomate ACVR,

    1. From the J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA; Veterinar Chirugische, Kl der Universitat, Zurich, Switzerland; and the Veterinary Specialty Hospital, Rancho Santa Fe, CA.
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  • Pierre Montavon Prof Dr Med Vet,

    1. From the J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA; Veterinar Chirugische, Kl der Universitat, Zurich, Switzerland; and the Veterinary Specialty Hospital, Rancho Santa Fe, CA.
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  • Josh Jackson DVM, Diplomate ACVS

    1. From the J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA; Veterinar Chirugische, Kl der Universitat, Zurich, Switzerland; and the Veterinary Specialty Hospital, Rancho Santa Fe, CA.
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  • No reprints available.

Kurt S. Schulz, DVM, Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616.

Abstract

Objective— To report the use of dorsal acetabular augmentation (DAA) in canine total hip arthroplasty (THA) and to evaluate the clinical and radiographic outcome after a minimum of 1 year follow-up.

Study Design— Clinical study.

Animals— Nine dogs that had THA.

Methods— Ten hips requiring acetabular augmentation for optimum acetabular cup implantation for THA were evaluated retrospectively. The excised femoral head and neck was used as the corticocancellous bone graft for index THA surgeries, and the dorsal crest of the ipsilateral ilial wing was used as the bone graft in 1 dog that had a revision surgery. Clinical and radiographic follow-up examinations were performed at approximately 8 weeks and 1 year postoperatively. Long-term radiographic examinations included use of a standing dorsal acetabular rim (DAR) projection for assessment of graft-recipient boundary. Functional clinical outcome was assessed using direct patient evaluation and telephone interview.

Results— One dog failed to regain limb function after surgery. Suspected aseptic loosening of the acetabular cup was observed on radiographs approximately 12 weeks postoperatively. Excluding this single explantation, follow-up physical and radiographic examinations indicated good implant and graft positioning and normal function for all dogs.

Conclusions— Acetabular augmentation permitted implantation of an appropriately sized acetabular cup while maintaining complete DAR coverage of the prosthesis. Nine out of 10 hips had a successful outcome with minimal radiographic and no functional abnormalities. Further follow-up is necessary to determine the long-term outcome of DAR augmentation in canine THA.

Clinical Relevance— Acetabular augmentation with an autogenous corticocancellous bone graft constructed from the femoral head and neck can provide complete DAR coverage to permit use of an appropriately sized acetabular cup in THA.

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