11324150

Source:http://linkedlifedata.com/resource/pubmed/id/11324150

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0004927, umls-concept:C0022742, umls-concept:C0027651, umls-concept:C0205198, umls-concept:C1272745
pubmed:issue	3
pubmed:dateCreated	2001-4-27
pubmed:abstractText	Wear of the central bushing made of ultra-high molecular weight polyethylene (PE-UHMW) of the hinged knee endoprosthesis of a tumour-resection system is the leading reason for revision. The aim of the study was to optimize the wear characteristics of the endoprosthesis on the basis of the tribological properties of new materials and an additional finite element (FE) calculation taking account of the given design. In screening tests the reference combination of PE-UHMW bushing and CoCr axis--used in the clinical setting--was first tested. The PE-UHMW bushing was then replaced by one made of each of the materials reinforced high-density polyethylene (PE-HD) and carbon fibre-reinforced epoxy resin (CFRP). In addition, a new material combination with an alumina ceramic bushing and a CFRP axis was investigated. In comparison with the reference combination PE-UHMW/metal, the combination of ceramic bushing and CFRP axis showed less wear. However, with the particular design of the prosthesis studied here, high mechanical loading applied experimentally resulted in mechanical failure. FE calculations confirmed these experimental results. Improvement of the wear characteristics of this specific implant caused therefore be achieved only by optimizing the bearing design.
pubmed:language	ger
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/1262533
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Mar
pubmed:issn	0013-5585
pubmed:author	pubmed-author:GradingerRR, pubmed-author:LehnerSS, pubmed-author:MittelmeierWW, pubmed-author:SteinhauserEE, pubmed-author:SturSS
pubmed:issnType	Print
pubmed:volume	46
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	75-9
pubmed:dateRevised	2006-11-15
pubmed:meshHeading	pubmed-meshheading:11324150-Biomechanics, pubmed-meshheading:11324150-Bone Neoplasms, pubmed-meshheading:11324150-Equipment Failure Analysis, pubmed-meshheading:11324150-Humans, pubmed-meshheading:11324150-Knee Prosthesis, pubmed-meshheading:11324150-Prosthesis Design
pubmed:year	2001
pubmed:articleTitle	[New compounds for improving wear behavior of a tumor knee endoprosthesis].
pubmed:affiliation	Klinik für Orthopädie und Sportorthopädie der Technischen Universität München. s.lehner@lrz.tum.de
pubmed:publicationType	Journal Article, Comparative Study, English Abstract, Research Support, Non-U.S. Gov't