Biocanin V, et al. - In this study, the retrograde obturation quality of the following materials were compared: Calcium silicate (Biodentine; Septodont, Saint-Maur-des-Fosses, France), mineral trioxide aggregate (MTA+; Cerkamed Company, Stalowa Wola, Poland), and glass ionomer cement (Fuji IX; GC Corporation, Tokyo, Japan) for improving the outcome of periapical surgery. For hermetic obturation of retrograde root canals, biodentine and MTA possessed certain advantages over Fuji IX. Biodentine showed a tendency toward the lowest marginal gap at the cement-to-dentin interface.