Finite element analysis of flared fractured maxillary central incisors restored with composite core full crown, fiber post full crown, everStick post full crown, and endocrown using lithium disilicate material

ABSTRACT Aim: To compare and evaluate the stress distribution of flared fractured maxillary central incisors restored with, fiber post, everStick post, and endocrown (EC) by FEA. Methods: Four three-dimensional FEA models that simulated a maxillary incisor with excessive structure loss and flared root canals were created and restored with the following techniques/materials: Model 1 – composite core/full ceramic crown; Model 2 – fiber post/full ceramic crown; Model 3 – everStick post/full ceramic crown; and Model 4 – eEC. A 100-N static load was applied at the center of the palatal surface of the tooth to calculate stress distribution. MSC NASTRAN 2020 and postprocessing were done using software ALTAIR HYPERVIEW 2022 for FEA analysis. Results: Root canal treated fractured flared maxillary central incisors with composite core, and full crown showed an overall maximum stress value of 1080 MPa followed by EC 961 MPa, fiber post/crown group 888 MPa, and everStick/crown group 864 MPa. Conclusion: Overall stress seen in fractured flared maxillary central incisors restored with composite core – Emax full crown was maximum followed by EC, fiber post, and everStick full crown models. The overall stress seen with fiber post and everStick was almost similar and less compared to the other two models.