What is the purpose of using a root canal sealer during endodontic treatment?

The use of a root canal sealer during endodontic treatment primarily serves to bond the canal filling material to the walls of the root canal system. This sealing agent plays a critical role in ensuring a tight seal between the filling material and the canal walls, which helps to prevent the ingress of bacteria and other contaminants that could lead to reinfection. A proper seal also enhances the overall effectiveness of the filling material by ensuring that it stays in place and maintains its integrity over time.

In addition to bonding, the sealer can help fill any microscopic voids or irregularities that may be present in the canal walls, providing an added layer of protection. This is essential for long-term success in endodontic treatment, as it contributes significantly to the sealing of the endodontic space against bacterial penetration.

Other options may focus on aspects like infection prevention or structural integrity, but the specific function of the sealer is to bond the filling material effectively, facilitating a comprehensive and lasting endodontic treatment outcome.