Open Access
CC BY 4.0 · VCOT Open 2019; 02(01): e19-e26
DOI: 10.1055/s-0039-1683892
Case Report
Georg Thieme Verlag KG Stuttgart · New York

Revision of a Press Fit Biological Fixation Stem Fracture in a Dog

Authors

  • Massimo Petazzoni

    1   Department of Orthopaedics and Traumatology, Clinica Veterinaria Milano Sud, Borromeo, MI, Italy
  • Elena De Giacinto

    2   Clinica Veterinaria San Carlo, Brescia, BS, Italy
  • Denis Marcellin-Little

    3   Department of Surgical and Radiological Sciences, University of California Davis, Davis California, United States
  • Michael Kowaleski

    4   Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts, United States
Further Information

Publication History

29 September 2018

05 February 2019

Publication Date:
26 March 2019 (online)

Abstract

This report describes a clinical case of a press fit biological fixation femoral implant neck fracture (fatigue failure) and its revisions in a dog. A total hip arthroplasty revision was performed. The stem was replaced with a bigger one through a V-shape osteotomy of the proximal–lateral aspect of the femur. Stabilization was accomplished using a locking plate and two over-the-plate cerclage wires. Subsidence of the femoral stem occurred following revision and was revised with a second revision in which a collared stem was used. Two revision surgeries were necessary to have a stable functional prosthesis with successful bone integration at 7 months postoperative revaluation. Major errors encountered in this case were placement of an undersized stem and an inadequate femoral canal stability/press-fit. Fracture of a BFX femoral stem neck has not been previously reported.

Author contribution

Massimo Petazzoni and Elena De Giacinto contributed to conception of study, study design, acquisition of data and data analysis and interpretation. Denis Marcellin-Little contributed to study design and data analysis and interpretation. Michael Kowaleski contributed to study design, acquisition of data and data analysis and interpretation. All authors drafted, revised and approved the submitted manuscript.