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Aim: Metal-supported ceramics as crown material and glass fiber posts as dental post materials are in frequent current use. In recent years, it has been claimed that stress-based biomechanical problems in dentistry can be resolved with the benefit of the low elasticity modulus of polyetheretherketone (PEEK) material. The aim of this study was to use finite element analysis (FEA) to compare the stresses formed by forces applied after the use of PEEK material as dental post and crown material as an alternative to glass fiber posts and metal-supported ceramic crowns. Methodology: The stress analysis method used in this study was FEA. First, micro-computed tomography (micro-CT) images were obtained of a maxillary central incisor tooth and the data of the post materials scanned with a 3-dimensional (3D) laser scanner were uploaded to a computer program. 3D models were obtained with designs made in the computer program of all the materials. The modelling of a maxillary central tooth was completed using 2 different post materials (glass fiber and PEEK) and 2 different crown materials (metal ceramic and PEEK) and 4 groups were formed for analysis. By applying force of 100 N at 135o from the absolute central point of the palatinal surface of the tooth, the stress values and distribution occurring in the 3D periodontal models were compared. Results: The use of PEEK post reduced the stresses occurring on the periodontal ligament (PDL) and the cortical bone, and caused no significant change in the stresses on the crown. The use of PEEK crown reduced the stresses occurring on the crown and increased the stresses occurring on the PDL and cortical bone. Conclusions: With further in vitro and clinical studies of PEEK material, it can be considered that within a short time PEEK post and PEEK crown could be in routine use in dentistry.   How to cite this article: Tekin S, Adiguzel O, Cangul S. An evaluation using micro-CT data of the stress formed in the crown and periodontal tissues from the use of PEEK post and PEEK crown: A 3D finite element analysis study. Int Dent Res 2018;8(3):144-50.   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

international dental research

An evaluation using micro-CT data of the stress formed in the crown and periodontal tissues from the use of Peek post and Peek crown: A 3D finite element analysis study