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Proceedings Paper

Investigations on the dynamics of water in structural dentine
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Paper Abstract

The aim of this study was two fold: (1) to investigate the nature and degree of water loss at 21°C (dehydration) and relate these findings with (2) strains produced in dentine structure during water loss and regain. The nature and degree of water loss was investigated using Nuclear-Magnetic Resonance Spectroscopy and gravimetric analysis. Digital Moire Interferometry (DMI) was used to study the patterns of strain distribution during water-loss (dehydration) and water-regain (rehydration) at 21°C. The gravimetric analysis showed that dentine exhibited a biphasic response in water-loss. An initial rapid phase followed by a gradual and steady phase. DMI showed that dehydration induced strains were formed within dentine in three phases. These experiments highlighted that the major portion of free water from dentine was lost rapidly from the surface and the dentinal tubules, as soon as they are exposed to 21°C (55% RH). DMI showed that dehydration produced strains in the dentine structure after an initial latent period. Rehydration caused almost complete reversal of the dehydration induced water-loss and strains.

Paper Details

Date Published: 15 February 2006
PDF: 8 pages
Proc. SPIE 6137, Lasers in Dentistry XII, 613702 (15 February 2006); doi: 10.1117/12.640149
Show Author Affiliations
Adeela Rafique, National Univ. of Singapore (Singapore)
Anil Kishen, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 6137:
Lasers in Dentistry XII
Peter Rechmann D.D.S.; Daniel Fried, Editor(s)

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