Finite Element Analysis Of The Biomechanics Of A Dental Implant System

With the outstanding advantages of the implant denture, the implant restoration has been improved dramatically in the recent decades, and more and more patients prefer to choose this new prosthodontics. Most of the studies have shown multi-year success rates of more than90%for implants placed in patients. However implant failures were reported occasionally, including the implant fracture, loose, till the falling off. And one of the main causes of implant failure is excessive load on the interface of implant and bone caused by stress centralizing, which induces the absorption of the bone around implant. To maximize the chance for long-term implant stability and function, the design and selection of dental implant should base on better biomechanics compatibility and better biocompatibility.In this study, three-dimensional models of thread dental implant, cortical bone, cancellous bone, implant-abutment complex and superstructure were constructed by Solidworks software. To construct the jaw planting nest accurately, we used the application of the Boolean operations. The models were imported to Ansys Workbench software by bidirectional parameters transmitting between the two software. The efficiency and accuracy of the finite element analysis of the implant with different parameters was also evaluated.The macrostructure parameters, including implant diameter, length and thread shape were studied through finite element analysis from a biomechanical perspective. The study was also analysed the fatigue life of implant-abutment complex. The results indicated that the diameter of the implant has a greater impact than the length, isosceles trapezoid is the best thread shape and the implant-abutment junction has a low safety factor. To verify our conclusions, we compared with these results with some of the experimental conclusions.This paper explores the efficient construct of the model structure and studies several parameters of the implant and the implant-abutment complex. We obtain some interesting and useful results. It not only laid the some foundation for subsequent in-depth study, but also provide some reference for implants design and the clinical selection of implant.