Bearing-Foreign Material Deposition on Retrieved Co-Cr Femoral Heads: Composition and Morphology. Biomed Res Int 2015;2015:967278
Date
08/04/2015Pubmed ID
26236744Pubmed Central ID
PMC4506823DOI
10.1155/2015/967278Scopus ID
2-s2.0-84937703740 (requires institutional sign-in at Scopus site) 1 CitationAbstract
Bearing-foreign material deposition onto a femoral head can occur from contact with an acetabular shell due to dislocation, reduction, or subluxation. The purpose of this study was to comprehensively characterize deposit regions on retrieved cobalt-chrome femoral heads from metal-on-polyethylene total hip arthroplasties that had experienced such adverse events. The morphology, topography, and composition of deposition regions were characterized using macrophotography, optical profilometry, scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy. The deposit areas were relatively large, they were much rougher than the surrounding undamaged clean areas, and they displayed several distinct morphologies. Titanium alloy elements were the predominant constituents. Calcium and phosphorous were also detected within the deposit areas, in a composition that could nucleate abrasive hydroxyapatite. In addition, tungsten-rich particles, likely present as tungsten carbide, were observed on top of the titanium deposits. The increased roughness associated with these deposition features would be expected to accelerate damage and wear of the opposing liner and hence accelerate the development of osteolysis.
Author List
Tikekar NM, Heiner AD, Baer TE, Kruger KM, Callaghan JJ, Brown TD, Lannutti JJAuthor
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
AdultAged
Aged, 80 and over
Arthroplasty, Replacement, Hip
Chromium Alloys
Female
Foreign Bodies
Hip Prosthesis
Humans
Male
Middle Aged
Radiography
Surface Properties
