Measurement of shrinkage during photopolymerization of methacrylate resins by interferometric techniques: Local and global

ARENAS GUSTAVO F.; GUZMÁN MARCELO N.; VALLO CLAUDIA I.; DUCHOWICZ, RICARDO; TRIVI MARCELO

POLYMER TESTING

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2016 vol. 50 p. 262 - 269

0142-9418

Light based measurement techniques have largely proven its efficiency on polymer materials. In thisstudy we describe a method based on specific optical techniques for characterization of dental composites.First, a Dynamic Speckle Pattern (DSP) global analysis was made, which allowed qualitativedescriptions of the behavior of samples during polymerization from their upper surface view. Thisanalysis is complemented with local measurements of shrinkage by means of a fiber optic FizeauInterferometer. Second, a Time History Speckle Pattern (THSP) analysis of different samples was carriedout in order to gain a better understanding of the shrinkage development as the polymerization reactiontakes place. To show the virtues of these techniques, we applied them to both a commercial resin dentalcomposite and a model resin based on methacrylate monomers. Both techniques could serve as a goodcomparing test protocol among different commercial resins.