Abstract:

To investigate the effects of material properties on the strength of bilayered denture, the simplified model consisting of veneer, core and dentin was built, and maximum principal stress and equivalent stress were calculated by finite element analysis. Results showed veneer was the weak link of denture, and when Vita VM9 and Cercon Zirconia were used as veneer and core respectively, the bilayered denture showed high performance in mechanical property. In the three phases of occlusion, the maximum equivalent stress of veneer was 61.2, 80.2 and 84.5 MPa, the maximum equivalent stress of core was 133.5, 190.3 and 209.73 MPa. The maximum equivalent stress occurred at dental groove, tooth crypt, bottom of crown and bottom of core, respectively.

Key words: all-ceramic crowns, molars, core, veneer, stress analysis