Nidhi Manhas, Tanvi Kohli, Sulekha Manhas, Sanjana Khullar, Mrinal Kalhuria

ABSTRACT

Background: The present study was conducted for evaluating finite elemental stress analysis (FEA) of Monoblocks in root canals. Materials & methods: Forty maxillary incisor FEA models representing different monoblocks using several materials were created as follows: (a) primary monoblock with Mineral Trioxide Aggregate; (b) secondary monoblock with sealer (MetaSEAL) and Resilon; (c) tertiary monoblock with EndoREZ; and (d) primary monoblock with polyethylene fibre post-core (Ribbond). AAt a 135° angle to the tooth's long axis, a 300 N force was applied from the crown's palatal surface. Except for the glass-fibre post, the study's materials were presumed to be homogeneous and isotropic; the von Mises criteria was employed to express the findings. A statistical analysis was performed after recording all the results in a Microsoft Excel document. Results: Max von Mises stress values among specimens of Primary monoblock with Mineral Trioxide Aggregate group, Secondary monoblock with sealer (MetaSEAL) and Resilon group, Tertiary monoblock with EndoREZ group and Primary monoblock with polyethylene fibre post-core (Ribbond) group was 7.2º, 7.9º, 7.8º and 20.7º respectively. The places where force was applied had the highest strains. With more interfaces, both for the post-core systems and the sealers' monoblocks, the strains within the models grew. Conclusion: As the number of adhesive contacts increased, so did the stresses within the roots. Stresses inside the tooth structure can be decreased by forming a main monoblock within the root canal using either an endodontic sealer or an adhesive post-core device.