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Stresses in cement mantles of hip replacements: effect of femoral implant sizes, body mass index and bone quality

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posted on 2023-08-30, 13:33 authored by Steeve Lamvohee, Rajshree Mootanah, Paul Ingle, Kevin Cheah, John K. Dowell
The effects of femoral prosthetic heads of diameters 22 and 28 mm were investigated on the stability of reconstructed hemi-pelves with cement mantles of thicknesses 1-4 mm and different bone qualities. Materialise medical imaging package and I-Deas finite element (FE) software were used to create accurate geometry of a hemi-pelvis from CT-scan images. Our FE results show an increase in cement mantle stresses associated with the larger femoral head. When a 22 mm femoral head is used on acetabulae of diameters 56 mm and above, the probability of survivorship can be increased by creating a cement mantle of at least 1 mm thick. However, when a 28 mm femoral head is used, a cement mantle thickness of at least 4 mm is needed. Poor bone quality resulted in an average 45% increase in the tensile stresses of the cement mantles, indicating resulting poor survivorship rate.

History

Refereed

  • Yes

Volume

12

Issue number

5

Page range

501-510

Publication title

Computer Methods in Biomechanics and Biomedical Engineering

ISSN

1476-8259

Publisher

Taylor & Francis

File version

  • Accepted version

Language

  • eng

Legacy posted date

2011-06-15

Legacy creation date

2019-04-16

Legacy Faculty/School/Department

ARCHIVED Faculty of Science & Technology (until September 2018)

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