Document Type

Article

Publication Date

Summer 7-12-2023

Abstract

Aim: This study evaluated the influence of different access designs on maxillary two-rooted premolar teeth to assess their biomechanical behavior using finite element analysis. Methodology: Three simulated FEA models were accessed with three main different access cavity designs: the intact tooth (IT) model, the traditional access cavity (TAC), and the conservative access cavity (CAC). Two different radicular preparations were done for each simulated model. The buccal and palatal canals were prepared to the apical sizes #30/.04, and #40/.04. A cyclic load of 50 N was applied on the occlusal surface. The patterns of stress distribution, the maximum von Mises (VM), and maximum principal stresses (MPS) were evaluated and determined mathematically. Results: According to VM analysis, the occlusal surface of the CAC/30/.04 model recorded the highest VM stresses value (10.428 MPa), whereas the occlusal surface of the TAC/30/.04 recorded the lowest (7.576 MPa). According to MPS analysis, the occlusal surface of the CAC/40/.04 model had the greatest recorded stress value (3.7684 MPa), whereas the occlusal surface of the TAC/30/.04 model had the lowest value (3.0415 MPa). Radicular stresses were always of minimal value regardless of the model. Conclusion: The biomechanical behavior of endodontically treated teeth is influenced by the relationship between the access cavity margins and the functional load locations. Depending on each tooth's static and dynamic occlusal relationships, a specific access cavity design is recommended.

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