Time-resolved simultaneous measurement of group index and physical thickness during photopolymerization of resin-based dental composite
Research output: Contribution to journal › Article
Colleges, School and Institutes
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.
|Number of pages||1|
|Journal||Journal of Biomedical Optics|
|Publication status||Published - 1 Jan 2007|