Short-term evaluation of dorsal acetabular augmentation in 10 canine total hip replacements.
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.


METHODS
Clinical study.


METHODS
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.


CONCLUSIONS
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.
Pooya
Hooman A
HA
J. D. Wheat Veterinary Orthopedic Research Laboratory and the Department of Surgery and Radiological Sciences, School of Veterinary Medicine, University of California, Davis 95616, USA.
Schulz
Kurt S
KS
Wisner
Eric R
ER
Montavon
Pierre
P
Jackson
Josh
J
D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery*; D000818:Animals; D019644:Arthroplasty, Replacement, Hip / Q000662:veterinary*; D001947:Breeding; D004283:Dog Diseases / Q000601:surgery*; D004285:Dogs; D005260:Female; D006622:Hip Prosthesis / Q000662:veterinary*; D008297:Male; D016348:Osseointegration; D015207:Osteoarthritis, Hip / Q000601:surgery / Q000662:veterinary*; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome