Finite element analysis of the effect of different occlusal characteristics on the biomechanical behavior of posterior implant-supported single crown

doi:10.12337/zgkqzzxzz.2024.02.004

Abstract

Abstract: Objective The purpose of this study is to investigate the effect of occlusal characteristics on the biomechanical behavior of the implant-bone interface of a posterior implant-supported single crown under immediate loading, using finite element analysis. This aims to provide reference for the selection of clinical occlusal characteristics. Methods The finite element model of an implant-supported crown with immediate loading and surrounding bone was constructed using the interference fit method. Six different occlusal characteristics were designed according to natural teeth. Ansys Workbench 2021 R2 software was used to analyze the axial static loading of 200 N. All the data were evaluated using the comparative analysis method to assess the impact of different occlusal characteristics on implant-bone interface displacement and Von Mises stress. Results A-B-C occlusal contact produced the smallest displacement of the implant and surrounding cortical and cancellous bone (10.52 μm, 5.67 μm, 9.34 μm), while prosthodontic platform occlusal (3 points) contact produced the largest displacement of the implant, cortical bone, and cancellous bone (15.24μm, 8.94μm, 12.15 μm). Compared with other occlusal contact types, A-B occlusal contact produced the largest Von Mises stress in the implant (71.91 MPa), significantly reduced the maximum Von Mises stress in cortical bone and had the largest maximum Von Mises stress in cancellous bone ( 18.04 MPa, 17.81 MPa). Conclusion Different occlusal characteristics significantly affect the displacement and Von Mises stress distribution at the implant-bone interface under immediate loading, and also change the stress concentration sites. A-B-C occlusal contact is beneficial in reducing the Von Mises stress on the implant and surrounding bone tissues, while A-B occlusal design has a slight advantage in the axial transmission of occlusal force.

Key words: Displacement, Occlusion, Immediate loading, Von Mises stress, Initial stress

Yang Feng, Wang Mengya, Yin Wenjie, Zhang Zheng, Chen Jiang. Finite element analysis of the effect of different occlusal characteristics on the biomechanical behavior of posterior implant-supported single crown[J]. Chinese Journal of Oral Implantology, 2024, 29(1): 16-23.

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