Mixing and matching in ceramic-on-metal hip arthroplasty: an in-vitro hip simulator study . (Articolo in rivista)

Type
Label
  • Mixing and matching in ceramic-on-metal hip arthroplasty: an in-vitro hip simulator study . (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Affatato S, Spinelli M, Squarzoni S, Traina F, Toni A. (2009)
    Mixing and matching in ceramic-on-metal hip arthroplasty: an in-vitro hip simulator study .
    in Journal of Biochemistry (Tokyo)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Affatato S, Spinelli M, Squarzoni S, Traina F, Toni A. (literal)
Pagina inizio
  • 2439 (literal)
Pagina fine
  • 2446 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 42 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Laboratorio di Tecnologia Medica, Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; IGM-CNR, Unit of Bologna c/o IOR, Bologna, Italy ; Dipartimento di Ortopedia Traumatologia, Istituto Ortopedico Rizzoli, Bologna, Italy (literal)
Titolo
  • Mixing and matching in ceramic-on-metal hip arthroplasty: an in-vitro hip simulator study . (literal)
Abstract
  • The clinical success of second-generation metal-on-metal hip replacement and the good tribological performance of alumina ceramic revived an interest in hip articulation as a solution to reduce wear. This study was aimed at characterizing the wear behaviour of new hybrid ceramic-on-metal bearings. In particular, this study investigated the wear behaviour of ceramic-on-metal hip components (three different diameters configurations: 28, 32 and 36 mm), not specifically proposed to be coupled, in order to compare them with ceramic-on-ceramic, which is considered to be the gold standard for wear resistance. For this purpose, the weight loss over a standard wear simulation was monitored. Moreover, scanning electronic microscope observations were used to verify if any carbides removal, for the metallic components, triggered wears debris production promoting abrasive third-body wear. After five million cycles, our results showed significantly greater wear-in ceramic-on-metal compared with ceramic-on-ceramic, and significant greater wear for the 32-mm diameter compared with the 36-mm one. Our findings showed an increase in wear for the proposed hybrid specimens with respect to that of the ceramic-on-ceramic ones confirming that even in the case of ceramic-on-metal bearings, mixing and matching could not prove effective wear behaviour, not even comparable with that of the ceramic-on-ceramic gold standard. Wear patterns and roundness tolerances certainly discourage the coupling of components not specifically intended to be coupled. Unsuitable geometrical conformity could, in fact, result in a poor dynamic behaviour and lead to clinical failure. (literal)
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