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Reliability theory for load bearing biomedical implants

Reliability theory for load bearing biomedical implants
Reliability theory for load bearing biomedical implants
At present, load-bearing implants are designed on a deterministic basis in which the structural strength and applied loading are given fixed values, and global safety factors are applied to (i) cover any uncertainties in these quantities, and (ii) to design against failure of the component. This approach will become increasingly inappropriate as younger and more active patient demands become more exacting and as devices become more complex. The present work describes a preliminary investigation in which a scientific and probabilistic technique is applied to assess the structural integrity of the knee tibial tray. It is envisaged that by applying such a technique to other load bearing biomedical devices, reliability theory may aid in future lifing procedures and materials/design optimisation.
reliability theory, biomedical devices, tibial tray, lifetime prediction
0142-9612
1285-1292
Browne, M.
d134f3a0-b05d-4499-ae81-d79509a1d8c0
Langley, R.S.
3fac905f-197c-45b4-bd7c-c2df2235e279
Gregson, P.J.
ddc3b65d-18fb-4c11-9fa1-feb7e9cbe9fe
Browne, M.
d134f3a0-b05d-4499-ae81-d79509a1d8c0
Langley, R.S.
3fac905f-197c-45b4-bd7c-c2df2235e279
Gregson, P.J.
ddc3b65d-18fb-4c11-9fa1-feb7e9cbe9fe

Browne, M., Langley, R.S. and Gregson, P.J. (2000) Reliability theory for load bearing biomedical implants. Biomaterials, 20 (14), 1285-1292. (doi:10.1016/S0142-9612(99)00027-7).

Record type: Article

Abstract

At present, load-bearing implants are designed on a deterministic basis in which the structural strength and applied loading are given fixed values, and global safety factors are applied to (i) cover any uncertainties in these quantities, and (ii) to design against failure of the component. This approach will become increasingly inappropriate as younger and more active patient demands become more exacting and as devices become more complex. The present work describes a preliminary investigation in which a scientific and probabilistic technique is applied to assess the structural integrity of the knee tibial tray. It is envisaged that by applying such a technique to other load bearing biomedical devices, reliability theory may aid in future lifing procedures and materials/design optimisation.

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More information

Published date: 2000
Keywords: reliability theory, biomedical devices, tibial tray, lifetime prediction

Identifiers

Local EPrints ID: 21396
URI: http://eprints.soton.ac.uk/id/eprint/21396
ISSN: 0142-9612
PURE UUID: 9d997277-d363-4ccc-bee9-cb71c4f7b778

Catalogue record

Date deposited: 16 Mar 2006
Last modified: 15 Mar 2024 06:30

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Contributors

Author: M. Browne
Author: R.S. Langley
Author: P.J. Gregson

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