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Purpose of the study: This study intends to evaluate and compare the stress distribution by three designs of prefabricated metal posts, parallel post (EG post), parallel post with coronal flare (i-post) and a tapered post (Filpost) in endodontically treated permanent maxillary central incisor. This study will help the dentists to choose the post that would generate the least stress in endodontically treated teeth. Procedure: Three-dimensional (3D) finite element models were developed. The physical models include composite resin core material, dentin, endodontic post, luting cement and guttapercha. They were subjected to compressive load of 100 N at 135° angle with respect to longitudinal axis of tooth, above the level of cingulum, simulating the load condition in oral cavity and the effects of three posts on stress distribution, in endodontically treated maxillary central incisor was evaluated. Results: Stress distribution was found to be better in the models having parallel post and parallel post with the coronal flare. Coronal flare has an added advantage of better fit in the root canal. Conclusion: It was found that the stresses in maxillary central incisor with the parallel post with coronal flare were well distributed.

journal of contemporary dentistry

A Comparative Evaluation of Stress Distribution by Three Different Designs of Prefabricated Metal Posts on Endodontically Treated Permanent Maxillary Central Incisor: A Three-dimensional Finite Element Study