Analysis of cementless acetabular cup rotation

  1. McCartney, W.T. 13
  2. Lostado-Lorza, R. 2
  3. Mac Donald, B.J. 1
  1. 1 Dublin City University
    info

    Dublin City University

    Dublín, Irlanda

    ROR https://ror.org/04a1a1e81

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  3. 3 NOAH, 38 Warrenhouse Road, Baldoyle, Dublin 13, Ireland
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Journal:
International Journal of Applied Research in Veterinary Medicine

ISSN: 1542-2666

Year of publication: 2015

Volume: 13

Issue: 2

Pages: 122-124

Type: Article

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More publications in: International Journal of Applied Research in Veterinary Medicine

Abstract

Aseptic loosening of cement less acetabular cups is a recognised problem. To investigate this issue, acetabular cups (Kyon, Zurich) were implanted into artificial bone (Sawbones, Malmo) in accordance with manufacturer instructions, and loaded in mediolateral rotation under laboratory conditions. The torque required at different cup depths were recorded. The theoretical forces acting on the acetabular cup were calculated. The angle of the force, relative to the ground, acting on the cup during normal loading, was calculated as 113.48º. The results revealed that even small amounts of depth in suffciency increased the risk of mediolateral rotation of the cup at normal torque forces. The Kyon cup should be implanted with no holes showing at the dorsal acetabular rim. © 2015 Veterinary Solutions LLC. All rights reserved.