Mechanical Properties of Hip Joint Heads Made of the Dispersion Ceramic - Alumina Toughened Zirconia

摘要

For orthopaedic applications an Alumina Toughened Zirconia Ceramic was tested regarding its mechanical behaviour. We observed a marked higher strength compared to the requirements according to FDA guidelines and a significantly higher strength compared to alumina ceramic despite of 15% decreased fatigue burst strength. The wear resistance after ring-on-disc method is significantly improved comparing to standard Al_2O_3/Al_2O_3 pairings. It means the application of endoprosthetic components made of ATZ-ceramic offers more safety and reliability.