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Analyses of the Shape Deviations of the Contact Cones of the Total Hip Joint Endoprostheses
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SYSNO ASEP 0363697 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Analyses of the Shape Deviations of the Contact Cones of the Total Hip Joint Endoprostheses Author(s) Fuis, Vladimír (UT-L) RID, ORCID
Návrat, T. (CZ)
Vosynek, P. (CZ)Number of authors 3 Source Title IFMBE Proceedings, Vol. 31. - Singapure : Springer, 2010 / Lim C. T. ; Goh J.C.H. - ISSN 1680-0737 - ISBN 978-3-642-14514-8 Pages s. 1451-1454 Number of pages 4 s. Action World Congress of Biomechanics, WCB 2010 /6./ - In Conjunction with International Conference on Biomedical Engineering, ICBME /14./ and Asia Pacific Conference on Biomechanics /5./ Event date 01.08.2010-06.08.2010 VEvent location Singapore Country SG - Singapore Event type WRD Language eng - English Country SG - Singapore Keywords ceramic head ; FEM ; shape deviations of contact areas ; tensile stress ; total hip joint endoprosthesis Subject RIV BO - Biophysics CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000306716100370 DOI 10.1007/978-3-642-14515-5_370 Annotation Complex reliability analyses of the bioimplants are very important today, because the failures of them cause traumatic consequences for the patients. We are interested in the calculations of the reliability of the ceramic heads of hip joint endoprosthesis. Reliability of the component made of the brittle material depends on the material parameters and on the tensile stress distribution in the component. Tensile stresses in the heads are very significantly influenced by the shape deviations of the cone contact areas of the head and the stem. The shape deviations may be modeled at the macro-level - deviation from the nominal degree of taper, and at the micro-level - when the stochastic distribution of unevenness on the contact areas is respected. The problem of stress in ceramic heads was solved using the finite element method under ISO 7206-5 loading. The simulations of the loading of the one head pressed on the 5 different stems cones is solved and analysed. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012
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