Methods: To obtain an optimal material combination for the superstructure, we evaluated 4 different materials for the veneer (gold alloy, porcelain, composite resin, acrylic resin) and 3 different materials for the abutment (titanim, gold alloy, zirconia). We analyzed the stress distributions varying the loading parameters (500N vetical bite force, 140 N horizontal bite force, 1,000N oblique bite force). We applied a linear static analysis using 3-D FEA (Finite Element Analysis), using ABAQUS solver to analyze the principal stress and von-Mises stress in the veneering materials and surrounding bones. We also investigate the failure possibility of the veneering material, and the prosthetic components.
Results: There was no difference in stress values between superstructure materials against the horizontal loading and the oblique loading. Titanium produced the lowest stress values against the vertical loading with every veneering materials. Acrylic resin caused high stress values to abutment and it can lead to a fracture of abutment or veneering material itself.
Conclusion: The combination of composite resin as a veneering and titanium as an abutment displayed more favorable stress distribution.