Finite element analysis of the effect of implant design on stress distribution at the bone interface for different jaw densities
Objective To evaluate the effects of various implant shape designs on initial stability under different bone conditions,and to provide biomechanical experimental data and theoretical reference for the optimization of implant structure design.Methods SolidWorks software was used to establish the jaw models and implant models.The jaw models included neck,body,and bottom models,and were divided into type I,type II,and type III bones.The implant models were divided into neck,body,and bottom models.The peak equivalent stress values of the models under a vertical 100N load were analyzed by Ansys finite element analysis software,so as to screen the structures whose peak equivalent stress value was below the bone yield strength value.Orthogonal experiments were further conducted on these structural designs to compare and analyze the peak equivalent stress values of various structural combinations of implants in different bone types under a vertical 100N loading mode,so as to obtain the effects of each design on the initial stability and determine the optimal combination of structural designs.Results In the neck type I and II jaw models,the design of the implant neck depth had the greatest effect on the initial stability.In the neck type III jaw model,the design of the implant neck pitch had the greatest effect on the initial stability.Among the various body jaw models,the implant pitch design had the greatest effect on the initial stability.In addition,the implant bottom cutting edge design could not increase the initial stability of the implant.Conclusion Different design parameters should be selected according to different bone types in clinical implant selection and further implant design.In type I and type II bones,more attention should be paid to the selection of neck and body thread depth.In type III bone,more attention should be paid to the selection of neck pitch and body depth.
Oral implantFinite element analysisOrthogonal experimental designThread designInitial stabilityBiomechanics
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