ObjectiveTo use a 3-dimensional finite element method to analyze the stress distribution of the maxillary central incisor by three loads after dental implant prosthesis.MethodsProe software was applied to establish a 3-dimensional solid model including the dental implant，the upper structure and the maxillary bone, and then ANSYS workbench was adopted to simulate static loads on various parts of the dental implant so as to analyze the stress distribution.ResultsThe simulation showed that the maximal stress of cutting for cutting bite laid in the abutment screw while that of other two loads were in the crown.The maximal stress value of von mises of deep overbite was much higher than that of normal occlusion.The stress acting on the cortical bone, which was centralized on the implant neck, far exceeded that on the cancellous bone.The MPS (maximal principal stress) value mainly appeared in the region submitted to the load and the proximal margin.ConclusionsThis modeling method met the experimental requirements for model in the establishment of the dental implant and the upper structure.The results were consistent with clinical practice. All these provide an accurate reference for future dental implant prosthesis.