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Numerical and experimental simulation of the effect of long bone fracture healing stages on ultrasound transmission across an idealized fracture

Numerical and experimental simulation of the effect of long bone fracture healing stages on ultrasound transmission across an idealized fracture
Numerical and experimental simulation of the effect of long bone fracture healing stages on ultrasound transmission across an idealized fracture
The effect of various stages of fracture healing on the amplitude of 200 kHz ultrasonic waves propagating along cortical bone plates and across an idealized fracture has been modeled numerically and experimentally. A simple, water-filled, transverse fracture was used to simulate the inflammatory stage. Next, a symmetric external callus was added to represent the repair stage, while a callus of reducing size was used to simulate the remodeling stage. The variation in the first arrival signal amplitude across the fracture site was calculated and compared with data for an intact plate in order to calculate the fracture transmission loss (FTL) in decibels. The inclusion of the callus reduced the fracture loss. The most significant changes were calculated to occur from the initial inflammatory phase to the formation of a callus (with the FTL reducing from 6.3 to between 5.5 and 3.5 dB, depending on the properties of the callus) and in the remodeling phase where, after a 50% reduction in the size of the callus, the FTL reduced to between 2.0 and 1.3 dB. Qualitatively, the experimental results follow the model predictions. The change in signal amplitude with callus geometry and elastic properties could potentially be used to monitor the healing process
bioacoustics, biomechanics, biomedical measurement, biomedical ultrasonics, bone, elasticity, orthopaedics, ultrasonic propagation, ultrasonic transmission
0001-4966
887-894
Gheduzzi, S.
20fa7aa8-cc04-411d-b569-37e405132d10
Dodd, S.P.
b05ffaff-aee8-4252-af30-a19f5f222dc5
Miles, A.W.
822cf30f-f60e-4d63-954b-765eea09b184
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Cunningham, J.L.
6253f8e6-f747-44d7-8edb-6b0b22467978
Gheduzzi, S.
20fa7aa8-cc04-411d-b569-37e405132d10
Dodd, S.P.
b05ffaff-aee8-4252-af30-a19f5f222dc5
Miles, A.W.
822cf30f-f60e-4d63-954b-765eea09b184
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Cunningham, J.L.
6253f8e6-f747-44d7-8edb-6b0b22467978

Gheduzzi, S., Dodd, S.P., Miles, A.W., Humphrey, V.F. and Cunningham, J.L. (2009) Numerical and experimental simulation of the effect of long bone fracture healing stages on ultrasound transmission across an idealized fracture. Journal of the Acoustical Society of America, 126 (2), 887-894. (doi:10.1121/1.3158938).

Record type: Article

Abstract

The effect of various stages of fracture healing on the amplitude of 200 kHz ultrasonic waves propagating along cortical bone plates and across an idealized fracture has been modeled numerically and experimentally. A simple, water-filled, transverse fracture was used to simulate the inflammatory stage. Next, a symmetric external callus was added to represent the repair stage, while a callus of reducing size was used to simulate the remodeling stage. The variation in the first arrival signal amplitude across the fracture site was calculated and compared with data for an intact plate in order to calculate the fracture transmission loss (FTL) in decibels. The inclusion of the callus reduced the fracture loss. The most significant changes were calculated to occur from the initial inflammatory phase to the formation of a callus (with the FTL reducing from 6.3 to between 5.5 and 3.5 dB, depending on the properties of the callus) and in the remodeling phase where, after a 50% reduction in the size of the callus, the FTL reduced to between 2.0 and 1.3 dB. Qualitatively, the experimental results follow the model predictions. The change in signal amplitude with callus geometry and elastic properties could potentially be used to monitor the healing process

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More information

Published date: August 2009
Keywords: bioacoustics, biomechanics, biomedical measurement, biomedical ultrasonics, bone, elasticity, orthopaedics, ultrasonic propagation, ultrasonic transmission

Identifiers

Local EPrints ID: 71535
URI: http://eprints.soton.ac.uk/id/eprint/71535
ISSN: 0001-4966
PURE UUID: 9e1f17c5-6b20-4e2f-8b9f-aafd5046d6fa
ORCID for V.F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 17 Feb 2010
Last modified: 14 Mar 2024 02:48

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Contributors

Author: S. Gheduzzi
Author: S.P. Dodd
Author: A.W. Miles
Author: V.F. Humphrey ORCID iD
Author: J.L. Cunningham

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