1 January 2007 Time-resolved simultaneous measurement of group index and physical thickness during photopolymerization of resin-based dental composite
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J. of Biomedical Optics, 12(1), 014020 (2007). doi:10.1117/1.2709877
Abstract
Light-activated resin-based dental composites are increasingly replacing dental amalgam. However, these materials are limited by inefficient setting reactions as a function of depth that constrain the maximum extent of cure. Insufficient curing can contribute to an overall reduction in biocompatibility of the material. We demonstrate dynamic refractive index measurements of a commercial dental composite throughout cure using spectral domain low coherence interferometry. Our results show a linear relationship between the change in refractive index and polymerization-induced reduction in physical thickness during light-activated curing. This relationship between the optical and physical density demonstrates the potential of this technique as a unique noninvasive tool for measurement of the conversion degree of curing dental composite materials.
Peter H. Tomlins, Will M. Palin, Adrian C. Shortall, Ruikang K. Wang, "Time-resolved simultaneous measurement of group index and physical thickness during photopolymerization of resin-based dental composite," Journal of Biomedical Optics 12(1), 014020 (1 January 2007). http://dx.doi.org/10.1117/1.2709877
JOURNAL ARTICLE
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KEYWORDS
Refractive index

Composites

Polymerization

Composite resins

Polymers

Fourier transforms

Lamps

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