Open apices are considered to be the most challenging cases in endodontics. The rationale of this case report was to observe the effect of MTA and biodentine on root end formation in the same patient. Mineral trioxide aggregate (MTA) and biodentine were used for formation of apical plug followed by further obturation with gutta percha. It was reported that the initial root end formation was better in the case where MTA was used as apical plug material as compared to Biodentine