Physical properties of sealer incorporating QPEI nanoparticles.

aSolubility tests were performed in accordance with ISO 6876:2001(E) specifications for root canal sealing materials. Samples were weighed three times on an HM-200 precision scale. The mean reading was then recorded. All solubility results were in the clinically accepted range, in accordance with ISO specifications.bThermal analysis during gradual heating (0°C – 150°C; 10°C /min) of RCS samples incorporating 0%, 1%, 1.5% or 2% QPEI nanoparticles. Analysis of all samples was performed using a differential scanning calorimeter (DSC) device. Samples were cooled to 0°C and then heated to 150°C at a heating rate of 10°C/min. Thermal transition values were calculated using STAR software. All thermal transitions were in the same clinically accepted range.CFlow tests were conducted according to ISO 6876:2001(E) specifications. Three determinations were made and the mean value was calculated to the nearest millimeter. The minimal acceptable diameter was 20 mm. The results of all the test groups were in the clinically accepted range, in accordance with ISO specifications.