Abdo, S. B. A. (2015) “Sealing ability of gutta-percha/Nano HA versus Resilon/Epiphany after 20 months using an electrochemical model – an in vitro study”, Brazilian Journal of Oral Sciences. Limeira, SP, 11(3), pp. 387–391. doi: 10.20396/bjos.v11i3.8641375.