Theoretical model for calculating the rotation in cementless acetabular cup prosthesis implanted by press fit into a hip of canines

  1. Lorza, R.L. 3
  2. McCartney, W.T. 4
  3. Mac Donald, B.J. 1
  4. Martinez, R.F. 2
  1. 1 Dublin City University
    info

    Dublin City University

    Dublín, Irlanda

    ROR https://ror.org/04a1a1e81

  2. 2 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  3. 3 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  4. 4 NOAH, 38 Warrenhouse Road, Baldoyle Dublin 13, Ireland
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Journal:
Applied Mechanics and Materials

ISSN: 1660-9336

Year of publication: 2014

Volume: 627

Pages: 101-104

Type: Article

DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.627.101 SCOPUS: 2-s2.0-84914168936 WoS: WOS:000348158100020 GOOGLE SCHOLAR

More publications in: Applied Mechanics and Materials

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Abstract

The aseptic loosening of the cementless acetabular cup prosthesis implanted by press fit into a hip is a fault caused by the application of an excessive load, which creates the rotation of the cup on the hip [1]. This rotation of the cup on the hip disables the prosthesis, and a new surgical intervention to place correctly the cup in the hip housing is required. The aseptic loosening of the cementless acetabular cup has been studied during decades mainly through experiments and numerical methods [2,3,4]. This paper shows the development of a theoretical model for calculating the maximum load that the cup of the prosthesis can support as well as the angle and direction of the net load. The model proposed is based on the hertz laws [5], which considers the interface between the cup and hip as two spheres between which there is a coefficient of static friction (μ), and is applied on a acetabular cups [6] implanted in artificial bone [7].