THA Retrievals: The Need to Mark the Anatomic Orientation of the Femoral Head. J Arthroplasty 2015 Jun;30(6):1089-94
Date
02/16/2015Pubmed ID
25682206Pubmed Central ID
PMC4469575DOI
10.1016/j.arth.2015.01.030Scopus ID
2-s2.0-84931577927 (requires institutional sign-in at Scopus site) 1 CitationAbstract
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 TDAuthor
Karen Kruger PhD Research Assistant Professor in the MU-MCW Department of Biomedical Engineering department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
Arthroplasty, Replacement, HipChromium
Cobalt
Femur Head
Femur Neck
Finite Element Analysis
Hip Prosthesis
Humans
Polyethylene
Prosthesis Design
Rotation
Time Factors