3-D Finite element analysis of All-ceramic crown stress distribution subjected to various Post-and-core applications

Objective:To investigate the relationship between the different teeth post and core materials and stress distribution of all-ceramic crown and provide the basis for the design of clinical repair. Method:The fault images of spiral CT were used to construct the finite element analysis model of 1/2 defect in lingual side of maxillary first molar and allceramic crown,and load way was designed:600 N load was vertically concentrated,and ANSYS software was used to analyze the stress values of all-ceramic crown and dentin. Result:The von mises stress of all-ceramic crown and maximum tensile stress loads are concentrated on the loading area and was decreased progressively and radially towards surrounding. Conclusion:Because different teeth post and core materials can affect the stress distribution of all-ceramic crown significantly.In clinic,the suitable teeth post and nuclear materials were chosen according to dental defect of patients.