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Vet Comp Orthop Traumatol 2003; 16(04): 238-242
DOI: 10.1055/s-0038-1632786
Original Research
Schattauer GmbH

Effect of stem flattening on rotational stability of a canine femoral total hip component in polymethylmethacrylate cement

D. R. Mason
1   Iowa State University, Department of Veterinary Clinical Sciences, Veterinary Teaching Hospital, Ames, USA
,
K. S. Schulz
2   JD Wheat Veterinary Orthopedic Research Laboratory, Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, USA
,
P. H. Kass
3   Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, USA
,
S. M. Stover
4   JD Wheat Veterinary Orthopedic Research Laboratory, Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, USA
› Author AffiliationsThis work was presented in abstract format at the 36th Annual Meeting of the American College of Veterinary Surgeons, Chicago, Illinois, USA, 2001; Supported by funding from Biomedtrix Corporation, Allendale NJ, USA.
Further Information

Publication History

Received 09 August 2002

Accepted 10 February 2003

Publication Date:
22 February 2018 (online)

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Summary

This study was designed to determine the effect of flattening the lateral aspect of a commercially available femoral prosthesis on its rotational stability in polymethylmethacrylate cement. Five standard design and five laterally flattened size 7 canine femoral components were evaluated. The stems were embedded in commercially available medical grade polymethylmethacrylate and rotated 15° while torque and angular displacement data were collected. The stiffness, yield and failure variables were compared between commercial and flattened stems. None of the mechanical testing variables were statistically different between commercial and flattened stems although all of the mean values for flattened stems were higher (1-30%) than mean values for commercial stems. Rotational stability of a canine total hip replacement femoral component was not significantly enhanced by the flattened component design modification evaluated by the testing protocol in this study.

Keywords

Canine - femoral stem - torsion - total hip replacement
 

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