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Detail publikace
FUIS, V.
Originální název
Stress and reliability analyses of ceramic femoral head of hip joint endoprosthesis, with view to local shape deviations of cone contact areas
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
At present, implants are frequently used in clinical practice to return functionality to various parts of the human body. One big group make the implants of joints, one of the most frequently operated joints of the human body being the hip joint. At present, the problems of reliability of ceramic femoral heads for hip joint endoprosthesis are topical, as in a not negligible number of patients their destruction in vivo had taken place. Therefore stress and reliability analyses of the ceramic heads were made using computational modelling aimed at finding the causes of the head destruction. In the course of computational modelling it was stated that a pronounced influence on the stress and, hence, the reliability of the ceramic head, had the global and local unevenness of the cone contact areas of the head and the stem. Fig. 1. The stress and reliability studies made up to now have taken into consideration only the influence of model manufacturing inaccuracies, such as deviation from nominal cone shape, and non-circularity of cone contact areas, and their interactions. On the real contact areas, however, there are real manufacturing inaccuracies which can substantially differ from the model ones. That is why measurements have been made of shape deviations of cones of stems and heads, using an IMS UMPIRE measuring appliance. This paper deals with the analysis of stress in and reliability of a ceramic head, taking into consideration the measured deviations of contact areas of the head and the stem.
Klíčová slova v angličtině
Hip joint endoprosthesis, production deflections, computational modelling
Autoři
Rok RIV
2003
Vydáno
24. 8. 2003
Nakladatel
IFMBE
Místo
Sydney, Australia
ISBN
1877040142
Kniha
Medical Physics and Biomedical Engineering
Edice
Volume 4
Strany od
CD
Strany počet
4