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An experimental and computational study of the Hydrodynamics of High-velocity water microdrops for interproximal tooth cleaning

An experimental and computational study of the Hydrodynamics of High-velocity water microdrops for interproximal tooth cleaning
An experimental and computational study of the Hydrodynamics of High-velocity water microdrops for interproximal tooth cleaning
The flow field and local hydrodynamics of high-velocity water microdrops impacting the interproximal (IP) space of typodont teeth were studied experimentally and computationally. Fourteen-day old Streptococcus mutans biofilms in the IP space were treated by a prototype AirFloss delivering 115 µL of water at a maximum exit-velocity of 60 m?s?1 in 33-ms burst. Using high-speed imaging, footage was generated showing the details of the burst, and demonstrating the removal mechanism of the biofilms. Footage was also generated to characterize the viscoelastic behaviour of the biofilms when impacted by an air-only burst, which was compared to the water burst. Image analysis demonstrated the importance of fluid forces on the removal pattern of interdental biofilms. X-ray micro-Computed Tomography (µ-CT) was used to obtain 3D images of the typodont and the IP spaces. Computational Fluid Dynamics (CFD) simulations were performed to study the effect of changing the nozzle position and design on the hydrodynamics within the IP space. Results confirmed our previous data regarding the wall shear stress generated by high-velocity water drops which dictated the efficacy of biofilm detachment. Finally, we showed how CFD models could be used to optimize water drop or burst design towards a more effective biofilm removal performance
oral hygiene, streptococcus mutans, micro-computed tomography, computational fluid dynamics, dental plaque, biofilm
1751-6161
148-157
Rmaile, A.
d6bb51ea-0892-465c-a2fe-5e530bc6330a
Carugo, D.
0a4be6cd-e309-4ed8-a620-20256ce01179
Capretto, L.
eef08c1d-b2bf-43f1-a310-39d7405a1f0b
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Thurner, P.J.
ab711ddd-784e-48de-aaad-f56aec40f84f
Aspiras, M.
198433cd-5075-49d0-ac43-c305c35dc4f3
Ward, M.
a199bc96-75b6-415c-bffe-e68e8a00b468
De Jager, M.
97b2b3cb-02d5-4c02-9f12-49627b85b57c
Stoodley, P.
08614665-92a9-4466-806e-20c6daeb483f
Rmaile, A.
d6bb51ea-0892-465c-a2fe-5e530bc6330a
Carugo, D.
0a4be6cd-e309-4ed8-a620-20256ce01179
Capretto, L.
eef08c1d-b2bf-43f1-a310-39d7405a1f0b
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Thurner, P.J.
ab711ddd-784e-48de-aaad-f56aec40f84f
Aspiras, M.
198433cd-5075-49d0-ac43-c305c35dc4f3
Ward, M.
a199bc96-75b6-415c-bffe-e68e8a00b468
De Jager, M.
97b2b3cb-02d5-4c02-9f12-49627b85b57c
Stoodley, P.
08614665-92a9-4466-806e-20c6daeb483f

Rmaile, A., Carugo, D., Capretto, L., Wharton, J.A., Thurner, P.J., Aspiras, M., Ward, M., De Jager, M. and Stoodley, P. (2015) An experimental and computational study of the Hydrodynamics of High-velocity water microdrops for interproximal tooth cleaning. Journal of the Mechanical Behavior of Biomedical Materials, 46, 148-157. (doi:10.1016/j.jmbbm.2015.02.010).

Record type: Article

Abstract

The flow field and local hydrodynamics of high-velocity water microdrops impacting the interproximal (IP) space of typodont teeth were studied experimentally and computationally. Fourteen-day old Streptococcus mutans biofilms in the IP space were treated by a prototype AirFloss delivering 115 µL of water at a maximum exit-velocity of 60 m?s?1 in 33-ms burst. Using high-speed imaging, footage was generated showing the details of the burst, and demonstrating the removal mechanism of the biofilms. Footage was also generated to characterize the viscoelastic behaviour of the biofilms when impacted by an air-only burst, which was compared to the water burst. Image analysis demonstrated the importance of fluid forces on the removal pattern of interdental biofilms. X-ray micro-Computed Tomography (µ-CT) was used to obtain 3D images of the typodont and the IP spaces. Computational Fluid Dynamics (CFD) simulations were performed to study the effect of changing the nozzle position and design on the hydrodynamics within the IP space. Results confirmed our previous data regarding the wall shear stress generated by high-velocity water drops which dictated the efficacy of biofilm detachment. Finally, we showed how CFD models could be used to optimize water drop or burst design towards a more effective biofilm removal performance

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More information

Accepted/In Press date: 1 February 2015
e-pub ahead of print date: 21 February 2015
Published date: June 2015
Keywords: oral hygiene, streptococcus mutans, micro-computed tomography, computational fluid dynamics, dental plaque, biofilm
Organisations: nCATS Group

Identifiers

Local EPrints ID: 374901
URI: http://eprints.soton.ac.uk/id/eprint/374901
ISSN: 1751-6161
PURE UUID: 68bc5098-38c5-4d9d-936c-f4145f860fab
ORCID for J.A. Wharton: ORCID iD orcid.org/0000-0002-3439-017X
ORCID for P.J. Thurner: ORCID iD orcid.org/0000-0001-7588-9041
ORCID for P. Stoodley: ORCID iD orcid.org/0000-0001-6069-273X

Catalogue record

Date deposited: 05 Mar 2015 13:28
Last modified: 15 Mar 2024 03:34

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Contributors

Author: A. Rmaile
Author: D. Carugo
Author: L. Capretto
Author: J.A. Wharton ORCID iD
Author: P.J. Thurner ORCID iD
Author: M. Aspiras
Author: M. Ward
Author: M. De Jager
Author: P. Stoodley ORCID iD

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