Final answer:
The statement is true; obturations refer to the filling of the canals during a root canal therapy to seal them and prevent re-infection.
Step-by-step explanation:
The answer to the question is True: Obturations is indeed the term used to describe the filling up of the canals during an endodontic procedure, commonly referred to as root canal therapy (RCT). The main purpose of obturation in an RCT is to completely seal the cleaned canals with a material to prevent re-infection and promote healing of the surrounding periapical tissues. This is a critical step in the RCT process, as it helps to ensure the long-term success of the procedure and the health of the tooth.