Evaluation of stress and strain distribution in endodontically treated maxillary central incisor with two different post and core systems – A 3D Finite element analysis.
Background and objectives: Restoration of endodontically treated teeth is a common problem in restorative dentistry, related to the fractures. Such teeth often require additional support from the root canal by means of a post and core restoration. The present study was carried out to compare the stress & strain distribution patterns in endodontically treated maxillary central incisor restored with two different posts & core materials. Methods: Five three dimensional models were created of a maxillary central incisor with the aid of ANSYS version 10. Each of these model was subjected to standard loading in three directions (Horizontal load - 10N, Vertical load -100N, Oblique load - 50N) and the resultant von mises stresses & strains were evaluated by measuring the distance between the nodes. Results: Maximum Von Mises stress of 408.189 MPa was seen in Model-4 with Prefabricated Light transmitting post and glass ionomer cement core and minimum Von Mises stress of 85 MPa was seen in Model-2 with Prefabricated fiber reinforced post and glass ionomer cement core. Conclusion: Within the limitations of the study it was concluded that Prefabricated Light transmitting post with composite core showed better stress and strain distribution in dentin under all the loading conditions.
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