The aim of the present paper is to evaluate and compare the strength properties and deformation characteristics of cast and Selective Laser Melted (SLM) Co-Cr dental alloys by using CAD/CAE software. The Solid Works Simulation software is used for simulation of chewing loading of the virtual 3D model of four-part dental bridge. Two Co-Cr dental alloys, cast and SLM were used in this study. During simulation process by means of linear static analysis the displacements, strains, stresses, and reaction forces under the effect of the applied load were calculated. As a result, the equivalent von Mises stresses, Factor Of Safety (FOS) and displacements were evaluated in this study.
It was established that the highest values of the equivalent von Mises stresses of cast and SLM bridges are situated in the connectors between the teeth, i.e. the zones with the lowest areas of the cross sections. They are in the range 95-162 MPa, which is lower than the stress limits for the both materials. The minimum FOS of the both materials is higher than 1. In the cast bridges it is 1.32-2.64 in the zones with the highest loading, while in the SLM samples it is 2.61-5.68. As FOS shows the reserve strength of the material for the applied load, it is obvious that the SLM bridge possesses twice higher reserve strength. This allows optimization of the construction, economy of material and possibility for manufacturing of objects with porous structures.
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