Stress analysis of the ceramic head of hip joint endoprosthesis under different loading

• Autorzy: Fuis V. , Houfek M. , Navrat T. , Hlavon P.
• Konferencja: International Seminar of Applied Mechanics (11 ; 08-10.06.2007 ; Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

Using the system approach, the paper deals with the problems of ceramic head of hip joint endoprosthesis destructions, and with assessing the impact of shape deviations of conical surfaces on the tensile stress under different loading. Concerned are shape deviations from the ideal conical surfaces of the stem and the head of the endoprosthesis, which - when the head is put on the stem and the endoprosthesis loaded - form a contact configuration. 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 for spatial contact tasks. In the paper are presented and analysed the results of solution of the micro-level shape deviations, obtained from measurements made on the cones of stems and heads under the loading obtained from the experiments [1] and under ISO 7206-5 loading [2].

Słowa kluczowe

EN

endoprosthesis; ISO 7206-5; hip-joint

PL

endoproteza; ISO 7206-5; staw biodrowy

• Wydawca: Wydawnictwo Katedry Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Modelling and Optimization of Physical Systems
• Rocznik: 2007
• Tom: z. 6
• Strony: 47--50
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Fuis V.

• Centre of Mechatronics - Institute of Thermomechanics AS CR and Institute of Solid Mechanics, Mechatronics and Biomechanics, FME Brno University of Technology

autor

Houfek M.

• Centre of Mechatronics - Institute of Thermomechanics AS CR and Institute of Solid Mechanics, Mechatronics and Biomechanics, FME Brno University of Technology

autor

Navrat T.

• Centre of Mechatronics - Institute of Thermomechanics AS CR and Institute of Solid Mechanics, Mechatronics and Biomechanics, FME Brno University of Technology

autor

Hlavon P.

• Centre of Mechatronics - Institute of Thermomechanics AS CR and Institute of Solid Mechanics, Mechatronics and Biomechanics, FME Brno University of Technology

Bibliografia

• 1. Bergmann, G.; Graichen, F.; Rohlmann, A.: Hip Joint Loading During Walking and Running Mesured in two Patients. Journal of Biomechanics, Vol. 26, No. 8, 1993, pp. 969-990.
• 2. ISO 7206-5: Implants for surgery - Partial and total hip joint prostheses. Determination of resistance to static load of head and neck region of stemmed femoral components. 1992.
• 3. Fuis, V., Navrat, T.: Stress analysis of the hip joint endoprosthesis with shape deflections, Engineering Mechanics, Vol. 12, Nr. 5, pp. 323-330, 2005.