Abstract: Objective: To analyze the stress distribution characteristics of different materials custom post-and-core at different angles for maxillary central incisor by three-dimensional finite element analysis. Methods: The models with different inclination angles of post-and-core-and-crown in the maxillary central incisor were created. Three post-and-core materials were used in the model: cast gold-palladium alloy, glass fiber reinforced resin, and carbon fiber reinforced polyether ether ketone (CFR-PEEK). They were finally restored with an all-ceramic crown. The equivalent stresses in the post-and-core and dentin of the different models were analyzed under centric occlusion. Results: At the same angle, the highest stresses in the cast gold-palladium post-and-core correspond to the lowest stresses in the dentin. The CFR-PEEK post-and-core exhibited the lowest equivalent stress, corresponding to the highest stress in dentin. The stress of post-and-core and dentin decreases with increasing buccal angle for the same material. Conclusion: The angle of the post-and-core had no significant effect on restoration and dentin resistance under the same loading direction. The post-and-core with a lower elastic modulus is recommended when the dentin ferrule is intact.

Key words: three-dimensional finite element, customed post-and-core, stress analysis, maxillary central incisor