MICRO AND MACRO SHAPE DEVIATIONS OF THE CONTACT AREAS OF THE HIP JOINT ENDOPROSTHESIS

0314959 - ÚT 2009 RIV AU eng C - Konferenční příspěvek (zahraniční konf.)
Fuis, Vladimír - Houfek, Martin - Janíček, P.
MICRO AND MACRO SHAPE DEVIATIONS OF THE CONTACT AREAS OF THE HIP JOINT ENDOPROSTHESIS.
[Mirko a makro tvarové odchylky kontaktních ploch kyžele kyčelní endoprotézy.]
XXII International Congress of Theoretical and Applied Mechanics. Adelaide: University of Adelaide, 2008 - (Denier, J.; Finn, M.; Mattner, T.), s. 1-2. ISBN 978-0-9805142-0-9.
[XXII International Congress of Theoretical and Applied Mechanics. Adelaide (AU), 25.08.2008-29.08.2008]
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: shape deviations * ceramics * hip joint endoprosthesis
Kód oboru RIV: BO - Biofyzika

The paper deals with the problems of ceramic head of hip joint endoprosthesis destructions, and with assessing the impact of shape deflections of conical surfaces on the tensile stress in the head. Concerned are shape deviations from the ideal conical surfaces of the stem and the head of the endoprosthesis. The shape deviations may be modelled at the macro-level - this concerns model shape inaccuracies such as deviation from the nominal degree of taper, ovality, and their combination, or, possibly, 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 algorithm of the finite element method - system ANSYS under ISO 7206-5 loading. In the paper are presented and analysed the results of solution of the macro-level shape deviations and micro-level shape deviations, obtained from measurements made on the cones of stems and heads.

Příspěvek se zabývá výpočtovým modelováním vlivu mikro a makro tvarových odchylek kontaktních ploch hlavice a dříku totální kyčelní endorpotézy na napjatost v hlavici.
Trvalý link: http://hdl.handle.net/11104/0165314