Stress Analysis of Restored Damaged Maxillary Central Incisor

Objective To study the stress changes of different damaged maxillary central incisor restored with fiber post using three dimensional finite element method,to analysis the role of damaged degree in determining the stress distribution in structures.Methods Three dimensional finite element models of maxillary central incisor with various remaining tooth structure restored with fiber post all-ceramic crown were established by screw CT,Mimics software,FreeFrom software and Ansys software.A 100 N static load was applied at 45 degree to the long axis of the tooth at incisal 1/3.The Von Mises stress and maximal tensile stress were recorded.Results The stress level and distribution in fiber post,cement,pericementum,crest bone were not change when decrease the remaining tooth structure,only the stress level of cement increase little when remaining 0 mm dentin ferrule.Conclusion The decrease of tooth structure had no influence to the stress level and distribution of fiber post,cement,pericementum,crest bone.