Comparison of Microleakage in Teeth Obturated with Bioceramic vs. Resin- Based Sealers

Abstract

Microleakage is still an essential parameter that predetermines the final outcomes of the root canal treatment since it allows
the intrusion of bacteria and undermines obturation integrity. Sealers made of resin are considered to be one of the gold
standards based on their adhesive qualities and clinical history; nevertheless, the issue of polymerization contraction and
interfacial crevices remains. On the contrary, bioceramic sealers have already become bioactive substitutes with desirable
properties, such as dimensional stability, formation of hydroxyapatite, and possible chemical bonding to dentin. This
review makes a comparison between microleakage of teeth obturated by resin-based and bioceramic sealers based on
evidence of in vitro leakage models, ex vivo investigations, and existing clinical assessment. Results of the majority of
laboratory studies show that bioceramic sealers have less microleakage than resin-based sealers, however the outcomes
are inconsistent with the different methodology used. Although promising, clinical evidence is limited and calls on the
need to conduct long-term randomized controlled trials. All in all, bioceramic sealers have greater sealing potential but
more standardized studies are needed to confirm their effectiveness in the long-term in clinical practice.