Vet Comp Orthop Traumatol 2003; 16(02): 99-104
DOI: 10.1055/s-0038-1632758
Clinical Communication
Schattauer GmbH

Acetabular cup displacement after polyethylenecement interface failure: A complication of total hip replacement in seven dogs

S. Hunter
,
J. Dyce
,
L. Butkus
,
M. L. Olmstead
1   Department of Oregon Veterinary Referral Associates, Springfield, OR., U.S.A
› Author Affiliations

This work was not supported by any grant. The authors thank Andrew Kohm for statistical analysis, and Tim Vojt and Marc Hardman for figures.
Further Information

Publication History

Received: 17 September 2002

Accepted: 09 November 2002

Publication Date:
22 February 2018 (online)

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Summary

Acetabular cup displacement (ACD) was identified as a complication of cemented modular total hip replacement in seven dogs. ACD is characterized by mechanical failure of the polyethylene-cement interface and subsequent cup migration, and is a clinical entity distinct from classical aseptic loosening. ACD is a sequela of extrusion of the cup and lateralization of the prosthetic load-bearing axis. The acetabular cup displacement ratio (ACDR) has a statistically significant effect on whether ACD develops (P <0.0005). If ACD should occur, acetabular revision arthroplasty generally results in a good clinical outcome, if not complicated by infection.