Porous titanium substrates coated with a bilayer of bioactive glasses.

• Dripping-sedimentation technique is suitable for depositing bilayer coating. • The pores of the titanium substrate favor infiltration and adhesion of the coating. • Micromechanical behavior evaluated by instrumented microindentation. • Biomechanical and biofuntional balance of substrates coated by BG 45S5 – BG 1393. Porous titanium substrates coated by dripping-sedimentation technique with a novel bilayer of (45S5 / 1393) bioactive glasses are proposed to overcome some limitations of the use of titanium for implants, such as the stress shielding and the poor osseointegration. Composition, thickness, roughness and micromechanical behavior (P-h curves) of the coating and the influence of the porous titanium substrates have been characterized. Best results were found for the substrate with 30 vol.% of porosity and a range size of 355 ‒ 500 μm, since it enhanced the mechanical and biofunctional behavior, due to the good adhesion of the 1393 bioglass to the substrate and the greater bioactivity of the 45S5 bioglass, which would be in contact with the bone. [ABSTRACT FROM AUTHOR]