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- W2353614848 abstract "Objective:To investigate the effect of different veneer /core thickness ratio on the strength of IPS e.max with non-linear contact finite element method.Methods:Axisymmetric finite element models with different veneer /core thickness ratio of all-ceramic crown of mandibular first molar(1:4、1:2、1:1、2:1、4:1,respectively)was established.A 4.5-mm diameter ball was applied to load on the all-ceramic crowns.The stress distribution and its regularity in the model were calculated with different loads,the optimal thickness ratio was selected by the optimization theory.Results:The maximum principal stress of core ceramic concentrated in the interface of cement and core under the load area.The maximum principal stress of veneer existed on the surface of the crown,particularly around the places the ball contacted.As the load increased,the maximum principal stress of porcelain and core ceramic did.The biggest fracture strength of the five different veneer /core thickness ratio was 1:4 according to the optimization theory.Conclusion:Based on the study of finite element model veneer /core thickness ratio should be minimized,while the aesthetic requirement could be met,in order to increase the fracture strength of all-ceramic crown and improve lifetime." @default.
- W2353614848 created "2016-06-24" @default.
- W2353614848 creator A5005620831 @default.
- W2353614848 date "2012-01-01" @default.
- W2353614848 modified "2023-09-23" @default.
- W2353614848 title "Non-linear Contact Finite Element Analysis of Veneer/core Thickness Ratio on the Strength of IPS E.max" @default.
- W2353614848 hasPublicationYear "2012" @default.
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