Vet Comp Orthop Traumatol 2016; 29(03): 259-264
DOI: 10.3415/VCOT-15-01-0016
Case Report
Schattauer GmbH

Dislocation of a dual mobility total hip replacement following fracture of the polyethylene liner

Bertrand Vedrine
1   Clinique Vétérinaire Cauchoise, Rouen, France
,
Pierre Guillaumot
2   Clinique Vétérinaire Olliolis, Ollioules, France
,
Jean-Luc Chancrin
2   Clinique Vétérinaire Olliolis, Ollioules, France
› Author Affiliations
Further Information

Publication History

Received: 20 January 2015

Accepted: 18 February 2016

Publication Date:
17 December 2017 (online)

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Summary

An eight-year-old male English Setter was referred for management of a dislocation of a cemented dual mobility canine total hip prosthesis that occurred four months after the initial surgery. Revision surgery showed that the dislocation was associated with fracture of the ultra-high molecular weight polyethylene liner. The dislocation was successfully reduced after replacing the liner. A dual mobility acetabular component is composed of a mobile polyethylene liner inside a metallic cemented cup. Chronic wear of the components of a canine dual mobility total hip replacement has not been described previously. The use of this type of implant is fairly recent and limited long term follow-up of the implanted cases may be the explanation. Acute rupture of a polyethylene liner has never been described in humans, the only case of rupture of a polyethylene liner occurred 10 years after implantation. The case presented here of rupture of the polyethylene liner of a dual mobility total hip replacement is a hitherto unreported failure mode in this model of acetabular cup in the dog.