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publicado em 06/12/2012 às 12h15:00
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Nanotube titanium assist in osseointegration of metal implants

Researchers have created a thin film which, when deposited on titanium, is bone cells grow inside

 
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Researchers at the University of Sao Paulo (USP) are developing nanotubes of titanium oxide which may be used to improve the osseointegration of implants produced with the metal.

In the experiments, the scientists were able to obtain a thin, measuring between 500 nanometers to 3 micrometers thick and concentrated nanotubes, which can be seen only in high-resolution microscope. When the film is deposited on titanium nanotubes will host bone cells that can grow inside, Alain Robin describes Professor, Department of Materials Engineering, School of Engineering of Lorena.

According Robin, the films of titania (titanium oxide nanotubes) was obtained by anodization. The anodizing process conducted under the conditions defined in this work was successfully applied in dental implants national commercial manufacturing.

The professor, who has studied various alloys of titanium addition, oversaw the study of Materials Engineering student Michele B. A. Ribeiro wherein the nanotubes were obtained.

Anodising is an electrochemical process based on electrolysis. In an electrochemical cell is placed in a solution containing inorganic or organic fluoride ions, which may be sodium, ammonia, or hydrofluoric acid. The solutions to obtain the nanotubes must contain fluorides, the researcher explains.

Inside the net, is placed the specimen together with a titanium platinum electrode. From there is mounted an electric circuit with a current source, and titanium is the positive pole and the negative platinum. Then apply an electric potential difference (DDP) for the formation of titania [titania] in the form of a film, has Robin.

The geometric characteristics of the nanotubes, such as height and internal diameter, as has been done will depend on the anodization process, such as DDP amount of fluoride, anodization time and temperature of the solution. Robin states that do not yet exist in Brazil industrial applications for nanotube growth on titania and implants still require that studies of biological tests to check the cell growth within the titania nanotubes.

<i> With the information USP </ i>

Source: Isaude.net
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implant    nanotube    titanium oxide    Universidade de São Paulo    USP    film    Department of Materials Engineering    School of Engineering of Lorena    anodizing   
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