Finite Element Analysis Of The Simulated Magnesium Alloy External Stent Applied To Tooth Transplantation

ObjectiveIn this study,magnesium alloy external scaffolds suitable for tooth transplantation were developed.The effects of magnesium alloy external scaffolds on the biomechanical properties of tooth bite were simulated and analyzed by using three-dimensional finite element analysis method at the beginning of the implantation and after the complete absorption of the magnesium alloy scaffolds.Compared with natural teeth and implant teeth,it can be used as a reliable fixation support to enhance the initial stability of the transplanted teeth,verify the research value and feasibility of the subject,and provide experimental basis for further research.MethodsBased on the parameters of normal maxillary CBCT images and the scanning data of implant and abutment,natural tooth model and implant tooth model were established by reverse engineering software and 3D modeling software.The allograft tooth model and the allograft tooth model include magnesium alloy external support.Among them,the natural tooth model is equal to the blank control of the experiment,the implant tooth model is equivalent to the positive control,and the finite element analysis software is used to mesh each component model and connect the nodes.The loading conditions of 100 N along the long axis of the tooth and 100 N at 45 °angle with the long axis of the tooth were added at the corresponding node position,respectively.Finite element method is used to analyze and compare the stress variation trend,displacement change trend,maximum equivalent stress(MVMS)and maximum displacement of the four models.Results1.The stress,displacement and MVMSMD of natural teeth are very ideal.2.The displacement distribution and maximum displacement of implants in cortical bone are the closest to natural teeth in four working conditions.The results of stress and displacement distribution of dental implant model were similar to those of other similar researches,which verified the reliability of the model.3.The stress of the implanted teeth containing magnesium alloy support showed a relatively concentrated trend,the displacement distribution was relatively dispersed,the maximum equal effect force and the maximum displacement were better than the implant teeth,close to the natural teeth.The stress distribution of magnesium alloy external scaffold was relatively concentrated,which was much lower than that of implant teeth,but also significantly higher than that of natural teeth,and its stress and displacement distribution trend in cortical bone.The maximum equivalent effect force and maximum displacement of magnesium alloy scaffolds were much higher than those of implants.4.The stress distribution is more uniform and the displacement distribution is relatively concentrated.The maximum equal effect force and the maximum displacement are the minimum values of the four models.ConclusionsThe application of magnesium alloy external stent with external thread in tooth transplantation can make it have better biomechanical properties at the early stage of implantation and help to improve its initial stability.The experimental results can provide theoretical basis and reference for future experiments.