Relevant Aspects of Piranha Passivation in Ti6Al4V Alloy Dental Meshes

Passivation of titanium alloy dental meshes cleans their surface and forms a thin layer protective oxide (TiO2) on the material to improve resistance corrosion prevent release ions physiological environment. The most common chemical agent for passivation process is hydrochloric acid (HCl). In this work, we introduce use Piranha solution (H2SO4 H2O2) as passivating bactericidal metallic meshes. Meshes grade 5 (Ti6Al4V) were tested after different treatments: as-received control (Ctr), passivated by HCl, solution. Physical-chemical characterization all treated surfaces was carried out scanning electron microscopy (SEM), confocal sessile drop goniometry assess meshes’ topography, elemental composition, roughness, wettability free energy, that is, relevant properties with potential effects biological response material. Moreover, open circuit potentiodynamic tests evaluate behavior differently-treated under conditions. Ion conducted using Inductively Coupled Plasma mass spectrometry (ICP-MS). antibacterial activity prevention bacterial adhesion performed two strains, Pseudomonas aeruginosa (Gram-) Streptococcus sanguinis (Gram+). Additionally, viability study LIVE/DEAD test. We complemented counting cells attached visualized SEM. Our results showed improved hydrophilicity conferred notably higher in comparison HCl. This unique can be attributed differences obtained nanotextures TiO2 layer. However, treatment decreased electrochemical stability increased ion result porous coating formed surfaces, which compromise resistance. Framed limitations conclude viable alternative method beneficial merits further validation its translation applied clinically-used