A Comparison of Stress Distribution Around Dental Implants in Three Models of Arch Form to Replace Six Anterior Teeth of Maxilla using the Finite Element Analysis (FEA) Method

Abstract

Background and Objectives: Dental implant is a method to replace missed teeth, and especially for aesthetic it is important to replace the missing anterior teeth. Thus, in this study, for replacement of 6 maxillary anterior teeth by finite element analysis (FEA) method, stress distribution around implants in 3 models of maxillary arch were compared. Methods: In this in-vitro study, a toothless patient’s CBCT was used to create a model for maxillary anterior teeth. The ITI dental implant with a 10-mm length and 4.1-mm diameter was used to replace central and canine teeth. Results: By applying a 100-N force under a 30-degree angle, along with the increase of implants number, von Mises stress in the models was reduced. In a comparison of models A in each maxillary arch, the stress created in the cortical and cancellous bones in the square arch was less than ovoid and tapering arches. In addition, in a comparison between models B and C in the 3 maxillary arches, stress in the cortical and cancellous bones in the tapering arch was less than square and ovoid arches. The stress created in implants and cortical and cancellous bones in model C was less than the A and B models. Conclusions: The results show that unlike 2- or 3-implant models, in the 4-implant model, the stress distribution was reduced in cortical and cancellous bones.