ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This paper presents a methodology for assessing the in-vivo degradation mechanisms ofarticular components of total hip replacement (THR) prostheses of Charnley type. The experimentalprocedure revealed that common features can be observed even if the clinical cases underinvestigation were quite different with regard to the demographic data. It particularly emphasisesthe detrimental effects of foreign bodies on the damage of the articulating surfaces. These foreignbodies can migrate into the joint space before embedding definitely into the Ultra High MolecularWeight Polyethylene (UHMWPE) acetabular cup surface where they further participate to a thirdbody wear mechanism accelerated by a progressive increase of the femoral head roughness.Our experimental results underline, from a practical point of view, the need for carefulmanufacturing and clinical handling of porous surfaces, advocate for a systematic assessment ofretrieved components, particularly when changed because of unexplained wear, and makequestionable the clinical use of multifilament trochanteric cables
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.629.pdf
