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2 2013

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Biometrological method of pelvis measurement and anatomical positioning of endoprosthesis of hip joint

Ryniewicz A., Ryniewicz A. M., Madej T., Sładek J., Gąska A.

Metrology and Measurement Systems

2013

Vol. 20, nr 1

17-26

This elaboration presents the method of virtual positioning of the construction of an endoprosthesis of hip joint in a patient's pelvis and femoral bone, reconstructed on the basis of imaging obtained from computer tomography. It is based on the matching of an implant to individual anatomical-biomechanical conditions. The method is established on the following procedures: diagnostic, spatial modeling, virtual measuring and targeted biometrological application for the model of bone structures. The final effect of the completed procedures is selection and optimal positioning of the endoprosthesis of hip joint before a planned medical intervention. The determined geometrical parameters of bone structures and settled positioning of the endoprosthesis can create data for the system of computer navigation.

Numerical analysis of stress and strain occuring in the contact area of ceramic head - ceramic cup in the hip endoprostheses

Sobociński M.

Journal of Applied Mathematics and Computational Mechanics

2013

Vol. 12, nr 2

89--96

The paper presents the results of numerical analysis of the system “ceramic head - ceramic cup” in the hip joint endoprosthesis. Applying the Al2O3 ceramics in this kind of solutions, apart from all values of this material, can lead to grinding, if a high load is used. The analysis was run on the ADINA system. The geometrical model was elaborated on real measurements of the elements of endoprosthesis and also on the results provided by the producer.