The research is focused on modeling of the hip joint implants. The research objective is to increase the reliability of joint replacements. Reliability of ceramc heads is based on the Weibull weakest link theory. In order to calculate the failure probability it is necessary to determine the volume, in which the stress acts, and the material description of ceramics. Stress in the ceramic heads is determined numerically by finite element method (FEM). Material characteristics are determined experimentally from a set of destruction tests and subsequent statistical processing.

In vivo destroyed ceramic head of a hip joint implant

Related papers:

Koukal M., Fuis V., Florian Z., Janíček P.: A numerical study of effects of the manufacture perturbations to contacts of the total hip replacement. Engineering Mechanics, 2011, Vol. 18 (1), p. 33-42.

Fuis V., Návrat T.: Calculation of the ceramics Weibull parameters. World Academy of Science, Engineering and Technology, 2011, Vol. 58, p. 642-647.

Fuis V., Návrat T., Vosynek P.: Analyses of the shape deviations of the contact cones of the cotal hip joint endoprostheses. IFMBE Proceedings. Singapure : Springer, 2010 - (Lim, C.; Goh, J.) p. 1451-1454.

Fuis V.: Tensile stress analysis of the ceramic head with micro and macro shape deviations of the contact areas. Recent Advances in Mechatronics 2008-2009. Berlin : Springer, 2009, p. 425-430.

Fuis V., Janíček P., Hlavoň P.: Contact surfaces of big joints - sites of the development of limit states and other considerations. Engineering Mechanics, 2008, Vol. 15 (5), p. 381-388.

Fuis V., Janíček P., Houfek L.: Stress and reliability analyses of the hip joint endoprosthesis ceramic head with macro and micro shape deviations. 13th International Conference on Biomedical Engineering. Berlin: Springer Berlin Heidelberg, 2008, p. 1580-1584.

Fuis V., Varga J.: Stress analyses of the hip joint endoprosthesis ceramic head with different shapes of the cone opening. 13th International Conference on Biomedical Engineering. Berlin : Springer Berlin Heidelberg, 2008, p. 2012-2015.

Fuis V., Návrat T., Hlavoň P., Koukal M., Houfek M.: Analysis of contact pressure between the parts of total hip joint endoprosthesis with shape deviations. Journal of Biomechanics, 2007, Vol. 40, suppl. 2, p. 558-S558.

Fuis V., Návrat T., Hlavoň P., Janíček P.: Reliability of the ceramic head of the total hip joint endoprosthesis using Weibull’s weakest-link theory. World Congress on Medical Physics and Biomedical Engineering 2006. Seoul : Springer, p. 1-4.