%0 Journal Article
%T Computational Modeling of the Probability of Destructions in Total Joint Endoprosthesis Ceramic Heads using Weibull's Theory
%A P emysl Jan¨ª ek
%A Vladim¨ªr Fuis
%A Michal M¨¢lek
%J Acta Mechanica Slovaca
%D 2010
%I 
%R 10.2478/v10147-011-0033-9
%X This report deals with the issue of finding causes of ceramic heads destructions in total joint endoprostheses. It has been identified that the head fractures were caused by improper mutual geometry tolerances in the taper joint between the ceramic head and the metal stem. This fact was revealed by the results of deformation-stress analyses of heads with various geometric imperfections in the taper contact with the stem using FEM. The issue was further elaborated in the sense of determination of probability of head destruction by existing shape macro-deviations of the taper contact surface of the head and stem, such as varying taper ratio and ovality, taking into consideration micro-roughness from splinter machining of the surfaces of the internal taper of head and the external taper of stem. To estimate the probability of head destruction, we used weakest link Weibull's theory.
%K Computational Modeling
%K Ceramic Head
%K in Vivo Destructions
%K Hip Joint Endoprosthesis
%K Probabily of Rupture
%K Shape Deviations of the Contact Areas
%K Weibull Theory
%U http://versita.metapress.com/content/v764541535315056/?p=c4e49d4aca604e6293105e392acf6863&pi=4