Effect of wear velocity and ambient on titanium-based biomaterials: experimental and 3D finite element simulation
摘要
This study aims to perform in vitro experimental and 3D finite element method analysis (FEA) of the mechanical behavior of pure titanium and titanium alloys, which are frequently preferred in the human body, at different wear velocities and ambient conditions. Test specimens were subjected to different wear environments (distilled water, dry ambient) and wear velocity (1.2 Hz, 2.0 Hz) tests at a constant temperature of 37 °C in an experimental in vitro chewing test simulation. The wear volume loss and surface roughness behavior of the test specimens were analyzed using a non-contact 3D profilometer. In addition, the experimental environment was mathematically modeled using the FEA method with pure titanium material. The effect of bite force in the crown region of the implant body on the screw and abutment region was analysis throught chewing test procedures. The experimental data obtained in this study showed that although the wear environment affected the mechanical behavior of the test materials, the wear velocity had no effect during the chewing test procedures. In the wear test procedures, consecutive cracks were observed on the wear surface of the pure titanium test material at a dry wear ambient. It was concluded that these cracks could be subsurface, and the fatigue wear mechanism was active during the wear test. Furthermore, the FEA method analysis predicted that stress accumulations occurred in the implant screw regions and that this could lead to a failure mechanism.