The application of niobium and tantalum oxides for implant surface passivation

Abstract

The corrosion of the surfaces of metallic implants is a very aggressive process, which can cause inflammation and deposition of metal in the surrounding live tissue. Prevention of corrosion and improvement of the functional characteristics of different coatings for application on implant surfaces is essential. Niobium and tantalum anodic oxides of optimal thickness have enabled the manufacture of a new generation of bioengineering products displaying minimal corrosion.

In-situ and label-free optical monitoring of the adhesion and spreading of primary monocytes isolated from human blood: Dependence on serum concentration levels

“…Noted that the substratum is the high refractive index waveguiding film, typically about 200 nm thick, for which a wide range of biocompatible materials (e.g., titania, niobia (Starikov et al, 2007)) are available. Moreover, these substrata can be easily surface-modified or coated with a thin layer of virtually any material, provided it is transparent at the wavelength of the guided light.…”

Highly wear-resistant and biocompatible carbon nanocomposite coatings for dental implants

“…The thickness measurements were performed after deposition of the coating using a step method. Electrode potentials were measured using the standard AgCl electrode for rating the initial activity of metals [3]. The measurements were conducted in an electrochemical cell filled with physiological fluid (0.9% aqueous solution of NaCl).…”

“…A C C E P T E D ACCEPTED MANUSCRIPT 3 coating materials, DLC does not lead to blood coagulation. Instead, it effectively blocks the diffusion of metal ions, and therefore, it may be used to coat implants in contact with bone or soft tissues of the body.…”

“…Most commonly used metals exhibit low chemical passivity resulting in low biocompatibility and high corrosion of the surface [1][2][3][4][5][6]. Use of relatively passive ceramics is also limited because of their high brittleness [7].…”

Growth and Electrochemical Stability of Compact Tantalum Oxides Obtained in Different Electrolytes for Biomedical Applications

“…Nowadays, many researchers [3][4][5] are studying Ti-Ta alloys since its lower density, lower cost and superior corrosion resistance, as compared to titanium, makes them extremely promising. Although tantalum can be used in its metallic form, the natural oxide (Ta 2 O 5 ) may improve its bioactive response and chemical attack resistance 6 . The electrochemical method of anodic oxidation is one the most versatile process towards the growth of oxides on valve metals like tantalum and titanium 7 .…”