Fourier transform infrared spectroscopy characterization and evaluation of setting time and flow of nanoparticle incorporated cyanoacrylate cement – An in vitro study

Abstract

Aim: This study aims to determine the setting time and flow of a novel root canal sealer material with nanoparticle incorporated cyanoacrylate. Materials and Methods: To determine the setting time, sealer materials were mixed and packed into the stainless-steel ring molds of specific dimensions that are placed on a glass plate. The whole assembly was stored at 37°C, >95%relative humidity for at least 1 h. To measure the setting time, the needle of a custom-made Gilmore apparatus was adjusted vertically onto the surface of the sealer. To determine the flow, a volume of 0.05 ml mixed sealer was dropped on a glass plate. At 3 min after the onset of mixing, a second glass plate of 20 g weight was placed on the sealer and a 100 g weight was added to make a total mass of 120 g. The 120 g weight was unloaded after 10 min from the start of mixing. The minimum and maximum diameters of the sealer discs were measured by a digital caliper with a resolution of 0.01 mm. Results: Nanoparticle-modified cyanoacrylate cement has an initial setting time of 40 min and a final setting time of 75 min. Whereas the initial setting time for the AH Plus sealer is 238 min and the final setting time 480 min. The formulated nanoparticle incorporated cyanoacrylate sealer has a flow of 23.5 mm which is within the acceptable limits of ISO specification. Conclusion: The nanoparticle incorporated cyanoacrylate sealer has better setting time and flows within the limit of the American Dental Association specification.