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THA Retrievals: The Need to Mark the Anatomic Orientation of the Femoral Head. J Arthroplasty 2015 Jun;30(6):1089-94

Date

02/16/2015

Pubmed ID

25682206

Pubmed Central ID

PMC4469575

DOI

10.1016/j.arth.2015.01.030

Scopus ID

2-s2.0-84931577927 (requires institutional sign-in at Scopus site)   1 Citation

Abstract

The hypothesis of this study was that the rotational orientation of femoral head damage would greatly affect the volumetric wear rate of the opposing polyethylene (PE) liner. Damage on twenty retrieved cobalt-chromium femoral heads was simulated in a validated damage-feature-based finite element model. For each individual retrieval, the anatomic orientation of the femoral head about the femoral neck axis was systematically varied, in 30° increments. The PE wear rate differential between the maximum- versus minimum-wear orientations was often sizable, as high as 7-fold. Knowing the correct femoral head anatomic orientation is therefore important when analyzing the effects of femoral head damage on PE liner wear. Surgeons retrieving modular femoral heads should routinely mark the anatomic orientation of those components.

Author List

Heiner AD, Kruger KM, Tikekar NM, Callaghan JJ, Lannutti JJ, Brown TD

Author

Karen Kruger PhD Research Assistant Professor in the MU-MCW Department of Biomedical Engineering department at Marquette University




MESH terms used to index this publication - Major topics in bold

Arthroplasty, Replacement, Hip
Chromium
Cobalt
Femur Head
Femur Neck
Finite Element Analysis
Hip Prosthesis
Humans
Polyethylene
Prosthesis Design
Rotation
Time Factors