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Real time monitoring of progressive damage during loading of a simplified total hip stem construct using embedded acoustic emission sensors

Real time monitoring of progressive damage during loading of a simplified total hip stem construct using embedded acoustic emission sensors
Real time monitoring of progressive damage during loading of a simplified total hip stem construct using embedded acoustic emission sensors
Acoustic emission (AE) is a non-destructive technique that is capable of passively monitoring failure of a construct with excellent temporal resolution. Previous investigations using AE to monitor the integrity of a total hip replacement (THR) have used surface mounted sensors; however, the AE signal attenuates as it travels through materials and across interfaces. This study proposes that directly embedded sensors within the femoral stem of the implant will reduce signal attenuation effects and eliminate potential complications and variability associated with fixing the sensor to the sample. Data was collected during in vitro testing of implanted constructs, and information from both embedded and externally mounted AE sensors was compared and corroborated by micro-Computed Tomography (micro-CT) images taken before and after testing. The results of this study indicate that the embedded sensors gave a closer corroboration to observed damage using micro-CT and were less affected by unwanted noise sources. This has significant implications for the use of AE in assessing the state of THR constructs in vitro and it is hypothesised that directly embedded AE sensors may provide the first steps towards an in vivo, cost effective, user friendly, non-destructive system capable of continuously monitoring the condition of the implanted construct.
1350-4533
395-406
Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Taylor, Mark
e368bda3-6ca5-4178-80e9-41a689badeeb
Taylor, Andrew
39974814-4868-4c73-a3fa-2adfa4be3e46
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Taylor, Mark
e368bda3-6ca5-4178-80e9-41a689badeeb
Taylor, Andrew
39974814-4868-4c73-a3fa-2adfa4be3e46
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397

Mavrogordato, Mark, Taylor, Mark, Taylor, Andrew and Browne, Martin (2011) Real time monitoring of progressive damage during loading of a simplified total hip stem construct using embedded acoustic emission sensors. Medical Engineering & Physics, 33 (4), 395-406. (doi:10.1016/j.medengphy.2010.10.025).

Record type: Article

Abstract

Acoustic emission (AE) is a non-destructive technique that is capable of passively monitoring failure of a construct with excellent temporal resolution. Previous investigations using AE to monitor the integrity of a total hip replacement (THR) have used surface mounted sensors; however, the AE signal attenuates as it travels through materials and across interfaces. This study proposes that directly embedded sensors within the femoral stem of the implant will reduce signal attenuation effects and eliminate potential complications and variability associated with fixing the sensor to the sample. Data was collected during in vitro testing of implanted constructs, and information from both embedded and externally mounted AE sensors was compared and corroborated by micro-Computed Tomography (micro-CT) images taken before and after testing. The results of this study indicate that the embedded sensors gave a closer corroboration to observed damage using micro-CT and were less affected by unwanted noise sources. This has significant implications for the use of AE in assessing the state of THR constructs in vitro and it is hypothesised that directly embedded AE sensors may provide the first steps towards an in vivo, cost effective, user friendly, non-destructive system capable of continuously monitoring the condition of the implanted construct.

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Published date: 2011

Identifiers

Local EPrints ID: 185499
URI: http://eprints.soton.ac.uk/id/eprint/185499
ISSN: 1350-4533
PURE UUID: e7322512-47f5-4219-beb2-f499080cd31f
ORCID for Martin Browne: ORCID iD orcid.org/0000-0001-5184-050X

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Date deposited: 10 May 2011 14:46
Last modified: 03 Dec 2019 02:00

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