Abstract
ObjectivesDevelopment of a new generation of stable β alloy, free of aluminum or vanadium and with better biological and mechanical compatibility and evaluate the surface properties of Ti–6Al–4V and Ti–35Nb–7Zr–5Ta after anodization in hydrofluoric acid, followed by deposition of different electrolyte concentrations of magnesium particles by micro arc-oxidation treatment. MethodsDisks were anodized in hydrofluoric acid. After this first anodization, the specimens received the deposition of magnesium using different concentration (8.5% and 12.5%) and times (30s and 60s). The surface morphology was assessed using scanning electron microscopy, and the chemical composition was assessed using energy dispersive x ray spectroscopy. The surface free energy was measured from the contact angle, and the mean roughness was measured using a digital profilometer. ResultsAnodization in hydrofluoric acid provided the formation of nanotubes in both alloys, and the best concentration of magnesium considered was 8.5%, as it was the condition where the magnesium was incorporated without covering the morphology of the nanotubes. X-ray dispersive energy spectroscopy showed magnesium incorporation in all conditions. The average roughness was increased in the Ti–35Nb–7Zr–5Ta alloy. ConclusionsIt was concluded that anodizing could be used to deposit magnesium on the surfaces of Ti–6Al–4V and Ti–35Nb–7Zr–5Ta nanotubes, with better results obtained in samples with magnesium concentration in 8.5% and the process favored the roughness in the Ti–35Nb–7Zr–5Ta group.
Highlights
Titanium is used as a biomaterial in the manufacture of dental implants due to its properties of low density, high mechanical strength, high corrosion resistance and excellent biocompatibility [1]
These properties can be improved by combining other elements with titanium, forming titanium alloys such as Ti–6Al–4V (TI-6AL-4V), which are well known for use in dental implants
Magnesium was incorporated in all specimens anodized with magnesium acetate, and at 12.5% concentrations, the equipment detected fewer alloy elements, possibly because the magnesium layer was thicker (Table 2)
Summary
Titanium is used as a biomaterial in the manufacture of dental implants due to its properties of low density, high mechanical strength, high corrosion resistance and excellent biocompatibility [1]. These properties can be improved by combining other elements with titanium, forming titanium alloys such as Ti–6Al–4V (TI-6AL-4V), which are well known for use in dental implants. Evaluation of the mechanical properties have demonstrated that the difference between the modulus of elasticity of pure titanium (~100–110 GPa), Ti–6Al–4V (~110 GPa) and cortical bone (~10–30 GPa) [4] may compromise the load transfer to the adjacent bone, causing eventual failure of the implant [5]
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