Background and Objectives: It is a well-known fact that endodontically treated teeth are more prone to fracture. The most common causes have been high pressure used during obturation, dehydration of dentin and loss of tooth structure during endodontic therapy. Gutta Percha is the most commonly used obturating material; however, because it has a lower elastic modulus than dentin it has less of an impact on strengthening roots following root canal therapy. Therefore, a root canal sealer that has the ability to secure the tooth against root fracture would undoubtedly be beneficial. The aim of this study was to compare the effect of five different root canal sealers on the fracture resistance of endodontically treated teeth.

Methodology: 50 single rooted teeth with mature apices were used for this study. Samples were randomly divided into 5 groups. Root canal shaping was done using Protaper file system for all five groups with copious irrigation and gutta percha was used as an obturating material. Group 1: Canals coated with AH plus; Group 2: Canals coated with Maarc Ceraseal MTA based sealer; Group 3: Canals coated with MTA fillapex; Group 4: Canals coated with Angelus Bioceramic sealer; Group 5: Canals coated with Prime Bioceramic sealer. After storing these teeth for 2 weeks in 100% humidity, fracture force was measured using a universal testing machine.

Results: The results indicated that bioceramic sealers provided the highest fracture resistance, followed by MTA-based sealers, while AH Plus demonstrated the lowest resistance. Additionally, no significant differences were observed between the two bioceramic and between the two MTA-based sealers evaluated in the study.

Conclusion: Within the limitations of this study, it can be concluded that both Bioceramic and MTA sealers could significantly reinforce the endodontically treated teeth and improve their fracture resistance.