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Proceedings Paper

Dynamic cure measurement of dental polymer composites using optical coherence tomography
Author(s): Peter H. Tomlins; Will M. Palin; Adrian C. Shortall
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Paper Abstract

Dental amalgam is being increasingly replaced by Light-activated resin-based dental composites. However, these materials are limited by inefficient setting reactions as a function of depth, constraining the maximum extent of cure and reducing biocompatibility. In this paper we demonstrate a novel metrological tool for dynamic monitoring of refractive index and thickness change through curing resins using spectral-domain optical coherence tomography. We present real-time measurements from pre- to post-cure of a series of un-filled bisphenol-A diglycidyl ether dimethacrylate (bisGMA) and triethylene glycol dimethacrylate (TEGDMA) resins with different inhibitor concentrations. Our results demonstrate that refractive index measurements are sensitive to the extent of cure of such resins and that the inhibitor concentration strongly affects the cure dynamics and final extent of cure.

Paper Details

Date Published: 11 February 2008
PDF: 8 pages
Proc. SPIE 6843, Lasers in Dentistry XIV, 68430D (11 February 2008); doi: 10.1117/12.763305
Show Author Affiliations
Peter H. Tomlins, National Physical Lab. (United Kingdom)
Will M. Palin, The Univ. of Birmingham (United Kingdom)
Adrian C. Shortall, The Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 6843:
Lasers in Dentistry XIV
Peter Rechmann; Daniel Fried, Editor(s)

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