In Vitro Cytotoxicity of GuttaFlow 2 on Human Gingival Fibroblasts

IntroductionThe primary aim of this study was to evaluate the cytotoxic effects of GuttaFlow 2 (Coltène Whaledent, GmBH+Co KG, Langenau, Switzerland) on human gingival fibroblasts (HGFs).MethodsSamples of the test materials GuttaFlow 2, mineral trioxide aggregate (MTA), AH Plus (Dentsply DeTrey, Konstanz, Germany), and RealSeal sealer (SybronEndo, Orange, CA) were fabricated in cylindrical nonreactive plastic tubes of 3-mm diameter and 2-mm height. Extracts of freshly mixed and set samples were prepared using the ratio of 0.5 cm2/mL, 1 cm2/mL, and 1.5 cm2/mL according to ISO 10993 series. The extracts were incubated with HGF cells for 24 and 72 hours. A cell counting kit-8 assay (Dojindo, Kumamoto, Japan) assay was used to examine cytotoxicity. The results were analyzed with the independent t test and 1-way analysis of variance test (P < .05).ResultsAt all experimental conditions, the extracts of freshly mixed GuttaFlow 2 were nontoxic, whereas the extracts of freshly mixed and set AH Plus and RealSeal sealers were toxic to HGF cells (P < .05). The extracts of set GuttaFlow 2 were toxic at 72 hours (P < .05) and nontoxic at 24 hours. The extracts of freshly mixed MTA were nontoxic at both time points. For the extracts of set MTA, 1.5 cm2/mL was toxic at 72 hours and 1.5 cm2/mL and 1 cm2/mL were toxic at 24 hours (P < .05).ConclusionsBoth GuttaFlow 2 and MTA evoked a less toxic response to HGF cells than AH Plus and RealSeal sealer.