Cytotoxic Effect of Niobium Phosphate Glass–based Gutta-Percha Points on Periodontal Ligament Fibroblasts In Vitro - Meneses, Claudia Caroline Bosio; Olivi, Lucas Tofanello; Carvalho, Ceci Nunes; Gavini, Giulio; Sipert, Carla Renata (Journal of Endodontics, 2020)