An in-vitro assessment of the flow characteristics of different flowable composite systems

ObjectivesThe study aimed to compare the physical and mechanical properties of a new low viscosity commercial flowable composite (VertiseTM Flow) with other flowable composites (Grandio Flow and Premise Flowable) currently available on the market. The water absorption and degree of conversion (using FTIR) were also compared.MethodsWater absorption and desorption was measured in distilled water and artificial saliva gravimetrically, where the uptake and loss was noted at set time intervals. Degree of conversion of double bonds of uncured and cured samples of composites was measured using the FTIR.ResultsThe results showed increased uptake of water in distilled water and artificial saliva for VF, compared to the PF and GF. The diffusion coefficients were generally similar for desorption and absorption. The solubility percentage in distilled water was highest for VF in artificial saliva. All materials showed weight gain after desorption. Lastly, the degree of conversion was found to be almost similar for all the three flowable composites.ConclusionThe findings of the study conclude that the differences in the physical and mechanical properties of VF compared to GF and PF are influenced by the presence of HEMA.