The Mechanical Behaviors of Various Dental Implant Materials under Fatigue

Abstract

e selection of materials has a considerable role on long-term stability of implants. e materials having high resistance to fatigue are required for dental implant applications since these implants are subjected to cyclic loads during chewing. is study evaluates the performance of different types of materials (AISI 316L stainless steel, alumina and its porous state, CoCr alloys, yttriumstabilized zirconia (YSZ), zirconia-toughened alumina (ZTA), and cp Ti with the nanotubular TiO 2 surface) by finite element analysis (FEA) under real cyclic biting loads and researches the optimum material for implant applications. For the analysis, the implant design generated by our group was utilized. e mechanical behavior and the life of the implant under biting loads were estimated based on the material 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. e 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 TiO 2 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 × 10 5 and 1 × 10 9 cycles. ese 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 TiO 2 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.

Structural Characterization and Osseointegrative Properties of Pulsed Laser-Deposited Fluorinated Hydroxyapatite Films on Nano-Zirconia for Implant Applications

“…With the developments in materials science, zirconia implants have been employed to overcome problems with metal allergies and the gray color of titanium implants [ 3 , 4 , 5 ], providing patients with a new choice for dental implant materials [ 6 , 7 ]. In the process of implant repair, mechanical properties [ 8 ] and osseointegration [ 9 ] are key factors that ensure the success and long-term stability of the implant. Studies show that when zirconia implants are tested for static and cyclic fatigue under laboratory conditions, they can withstand the shear force required for implantation and show better mechanical properties than titanium implants [ 10 , 11 , 12 ].…”

Bioactive Glass and Silicate-Based Ceramic Coatings on Metallic Implants: Open Challenge or Outdated Topic?

“…The long-term behavior of implants represents one of the most important concerns, where fatigue fracture is one of the main causes of failure. Indeed, it was recently observed that the bone-implant difference of elastic modulus not only affects the bone to implant penetration but the long term behavior of the implant itself as well: the closer the elastic moduli are, the smoother is the bone- to implant stress transmission, thus improving the long-term mechanical behavior of the implant itself [22]. Titanium alloys, such as α-β alloys show an improved fatigue behavior, compared to pure CpTi, but the dissolution of alloys elements may be toxic for the growing bone [23].…”