Caracterização de superfícies de TiCp e Ti6Al4V condicionadas pela técnica de oxidação eletrolítica por plasma e adição de nanopartículas

Abstract

This study investigates the surface treatment of grade 4 titanium (TiCp) and grade 5 titanium (Ti6Al4V) through the plasma electrolytic oxidation (PEO) technique with the addition of nanoparticles. The research aims to improve the osseointegration of dental implants by combining the bioactive characteristics of hydroxyapatite (HA) and titanium dioxide (TiO2) nanoparticles. The chemical and structural properties of the coatings were analyzed using techniques such as scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), roughness, and contact angle measurements. The results showed that PEO promoted the formation of porous and homogeneous layers on both types of titanium, with good adhesion between the oxidized layer and the substrate. The HA and TiO2 nanoparticles were successfully incorporated into the treated surfaces, as evidenced by the XRD peaks and EDS analysis. The presence of these nanoparticles increased the roughness and wettability of the surfaces, which are essential properties for osseointegration. The calcium/phosphorus (Ca/P) ratio found in the coatings was close to the ideal proportion in human bone, indicating high bioactivity. Statistical analysis of the contact angles revealed that the samples treated with nanoparticles had lower contact angles, suggesting higher wettability and surface energy. The PEO technique proved effective in modifying titanium surfaces, providing coatings with favorable characteristics for application in dental implants.