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Mechanical behavior of different implant materials under fatigue

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Document pages: 10 pages

Abstract: The choice of materials has a considerable impact on the long-term stability of implants. Dental implant applications require materials with high fatigue resistance because these implants bear cyclic loads during mastication. In this study, the properties of different types of materials (AISI 316L stainless steel, alumina and its porous state, CoCr alloy, yttrium stabilized zirconia (YSZ), zirconia toughened alumina (ZTA) and cp Ti with nanotube TiO2 surface) were evaluated by finite element analysis (FEA). For analysis, we used implants designed by our team. According to the test results, the mechanical behavior and life of the implant under occlusal load were evaluatedaterial and surface properties. According to the condition based on ISO 14801, the FEA results showed that the equivalent von Mises stress values were in the range of 226.95 MPa and 239.05 MPa. The penetration analysis was also performed, and the calculated penetration of the models onto the bone structure ranged between 0.0037389 mm and 0.013626 mm. L-605 CoCr alloy-assigned implant model showed the least penetration, while cp Ti with the nanotubular TiO2 surface led to the most one. However, the difference was about 0.01 mm, and it may not be evaluated as a distinct difference. As the final numerical evaluation item, the fatigue life was executed, and the results were achieved in the range of 4 × 105 and 1 × 109 cycles. These results indicated that different materials showed good performance for each evaluation component, but considering the overall mechanical performance and the treatment process (implant adsorption) by means of surface properties, cp Ti with the nanotubular TiO2 surface material was evaluated as the suitable one, and it may also be implied that it displayed enough performance in the designed dental implant model.

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