Peer-reviewed veterinary case report
Dog hip replacement reluxation fixed by bigger prosthetic head
By Roe, S C et al.·Published in Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2015·Department of Clinical Sciences, United States·View original on PubMed →
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Original publication title: Acetabular cup liner and prosthetic head exchange to increase the head diameter for management of recurrent luxation of a prosthetic hip in two dogs.
- Species:
- dog
Plain-English summary
A 50 kg Malamute and a 65 kg Newfoundland both experienced repeated dislocations of their hip joints after total hip replacement surgery. In both cases, the dislocations were likely caused by the prosthetic components not fitting together properly. The veterinarians replaced the original smaller prosthetic head with a larger one and installed a new liner to accommodate it. After this adjustment, neither dog had any further dislocations for at least nine months to a year, allowing them to move more freely and comfortably.
People also search for: dog hip dislocation treatment · Malamute hip replacement issues · Newfoundland hip surgery recovery
Abstract
Component malalignment and impingement are possible causes of recurrent luxation following total hip replacement in the dog. In the two cases presented in this report, luxation that was probably due to impingement was managed by exchanging the standard 17 mm prosthetic head for a 24 mm prosthetic head. This required removal of the original acetabular cup liner and placement of a new polyethylene liner that would accept the 24 mm head into the stable acetabular shell. In the first case, a 50 kg Malamute dog, recurrent luxation was initially managed by component alignment revision, iliofemoral suture, triple pelvic osteotomy and a novel lasso technique, without long-term success. After exchanging the head and cup liner, luxation did not recur over a 12-month period. In the second case, a 65 kg Newfoundland dog, impingement was suspected after a second luxation event. Luxation did not recur during the nine months after exchange of the head and cup liner. The larger prosthetic head used in these two cases increased the impingement-free range-of-motion of the joint and increased the translation distance required for luxation (jump distance).
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/25448927/