Stress and Displacement Simulation of the Posterior Dental Implants on Variations of Applied Materials and Temperatures

Abstract

This study aims to analyze the von Mises stress, deformation, and safety factor in variations in dental implant materials (Ti-6Al-7 Nb and Y-TZP) and variations in thermal load (0°, 22°, and 70°) using the finite element analysis (FEA), namely the steady-state thermal solution and static structural. Loading at 225 N and type of teeth is posterior tooth model (Straumann Standard Plus Tissue Level RN). Abutment models, implant fixtures, and crowns varied with Ti-6Al-7Nb and Y-TZP materials, but the crown only used Y-TZP. The largest von Mises stress is produced by dental implants subjected to a thermal load of 70°C, while the lowest value is produced by dental implants subjected to a thermal load of 0°C. TTZ had the lowest von Mises stress of any dental implant variation, while ZZZ had the highest. TTZ dental implants are made up of a Ti-6Al-7Nb implant fixture, a Ti-6Al-7Nb abutment, and a Zir Y-TZP crown. All components of the ZZZ dental implants are made of Zir Y-TZP material, which has worse mechanical properties than Ti-6Al-7Nb. As a result, the von Mises stress is lowest at ZZZ. Ti-6Al-7Nb has better mechanical qualities than Zir Y-TZP. TTZ causes the least amount of stress when compared to other versions. At 70°C, the maximum displacement value for each dental implant variation occurs. The maximum displacement, however, is less than 4 µm, demonstrating that this value does not apply pressure on other bones in the mouth. The dental implants in this study were modeled using the FEA static structural analysis-steady state thermal analysis solution and were modified from 0.8 x European dental implant standards. Based on simulations on a variety of materials with a bite force of 225 N and thermal load (0°C, 22°C, and 70°C), all types of dental implants were judged safe because the factor of safety value was greater than 1.