Hip joint endoprosthesis implantation is a very common operation in orthopaedics due to the high frequency of joint injuries and degenerative joint diseases. New construction solutions of hip joint endoprostheses are constantly introduced into the market however there are no new material propositions [1,2]. Currently available metal endoprostheses are typified by great stiffness, which can induce implant loosening caused by bone resorption (stress-shielding). Alternative for metallic endoprostheses are the composite ones. Strict control of mechanical and biological composite properties is possible in wide range because of many different parameters such as: type of matrix and reinforcements, volume fraction and distribution of fibres, surface microstructure.
The aim of the presented work was to evaluate and to analyse the flexural rigidity along the stem length for composite endoprosthesis depending on a type of matrix (carbon matrix – CC 1D and two types of polymer matrix: PSU+CF 1D, PEEK+CF 1D) and carbon fibre orientation (carbon-carbon composites: CC 1D and CC 2D), in comparison with titanium endoprosthesis.
Durability of tested materials was also estimated on the basis of in vitro studies (samples incubation in simulated biological environment).