The evaluation of the characteristics of a dental restorative material is based on several criteria such as the
ability of the material to resist to potential degradation, its durability, the stress it exerts on the residual dental structures,
its resistance to surface wear, and its resistance to fracture. All these important factors must be taken into account and
tested when developing a new dental restorative material. Glass ionomer cements (GIC) possess unique properties,
including adhesion to tooth structure, bioactivity and fluoride release. The objective of this study is to evaluate by
analyzing the dynamics of the polarized speckle field how GIC samples, prepared according to two different methods
and conserved in water at 35°C, deteriorate.
Glass-ionomer cements (GIC) belong to the class of materials known as acid-base cements. The drying process of these materials and the evolution of their physical properties play an important role in the quality and durability of dental care. Since monitoring these processes contributes to the improvement of the knowledge on these materials, we aim in our work to monitor in real-time hardening of GIC using dynamic speckle. Speckle images are temporally analyzed by computing the temporal correlation coefficient. The temporal correlation curves present a Lorentzian profile, which characteristics vary during GIC hardening process.
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