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Alumina-zirconia nano-composites were recently developed as alternativebearing materials for orthopedics. Previous, preliminary reports show that suchalumina-zirconia nanocomposites exhibit high crack resistance and low wearrate. In this paper, additional information is given in terms of wear, crackresistance and ageing behaviour: femoral heads are inspected after 7 millioncycles of wear testing on a hip simulator, crack resistance is measured andcompared to other ceramics used today in orthopedics, slow crack growth isreported under static and cyclic fatigue, and aging resistance is assessed. Wealso report on the load to failure of femoral heads prototypes duringcompression tests. This overall reliability assessment ensures a potentialfuture development for these kinds of new nanocomposites in the orthopedicfield.

Reliability assessment in advanced nanocomposite materials for orthopaedic applications