In typical odontological studies water sorption in the restoration material is determined by weighing freshly mixed cement at regular intervals. In the case of resin-modified cement such processes where proven to be rapid. This is attributed to conformational changes in hydrophilic segments of the polymer on absorption of aqueous sodium chloride. It is considered that in this scenario the molecules form more compact coils than in the presence of pure water. To improve such evaluation process, to compare different dental cements and, at the same time, to develop new materials to be used in dental treatment, insight into the chemical reaction dynamics is important. Here we propose to use QENS to understand how the dynamics of the liquid used in the hydration process in dental cement is modified when confined and relate the results get to durability properties.