title: Reliability assessment in advanced nanocomposite materials for orthopaedic applications.
abstract: Alumina-zirconia nano-composites were recently developed as alternative bearing materials for orthopedics. Previous, preliminary reports show that such alumina-zirconia nanocomposites exhibit high crack resistance and low wear rate. In this paper, additional information is given in terms of wear, crack resistance and ageing behaviour: femoral heads are inspected after 7 million cycles of wear testing on a hip simulator, crack resistance is measured and compared to other ceramics used today in orthopedics, slow crack growth is reported under static and cyclic fatigue, and aging resistance is assessed. We also report on the load to failure of femoral heads prototypes during compression tests. This overall reliability assessment ensures a potential future development for these kinds of new nanocomposites in the orthopedic field.
authors.affiliation: Université de Lyon, INSA Lyon, MATEIS - UMR CNRS 5510, 69621 Villeurbanne Cedex, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Chevalier
authors.forename: Paola
authors.initials: P
authors.lastname: Taddei
authors.forename: Laurent
authors.initials: L
authors.lastname: Gremillard
authors.forename: Sylvain
authors.initials: S
authors.lastname: Deville
authors.forename: Gilbert
authors.initials: G
authors.lastname: Fantozzi
authors.forename: J F
authors.initials: JF
authors.lastname: Bartolomé
authors.forename: C
authors.initials: C
authors.lastname: Pecharroman
authors.forename: J S
authors.initials: JS
authors.lastname: Moya
authors.forename: L A
authors.initials: LA
authors.lastname: Diaz
authors.forename: R
authors.initials: R
authors.lastname: Torrecillas
authors.forename: Saverio
authors.initials: S
authors.lastname: Affatato
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D006621:Hip Joint / Q000601:surgery; D006622:Hip Prosthesis; D008163:Luminescent Measurements; D008422:Materials Testing / Q000379:methods*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites; D009985:Orthopedics; D011475:Prosthesis Failure; D013314:Stress, Mechanical; D013997:Time Factors; D015040:Zirconium / Q000737:chemistry
chemical_list: D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide