Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5357481 | Applied Surface Science | 2015 | 6 Pages |
Abstract
We show that Atomic Layer Deposition is a suitable coating technique to prevent metal diffusion from medical implants. The metal distribution in animal bone tissue with inserted bare and coated Co-Cr alloys was evaluated by means of micro X-ray fluorescence mapping. In the uncoated implant, the migration of Co and Cr particles from the bare alloy in the biological tissues is observed just after one month and the number of particles significantly increases after two months. In contrast, no metal diffusion was detected in the implant coated with TiO2. Instead, a gradient distribution of the metals was found, from the alloy surface going into the tissue. No significant change was detected after two months of aging. As expected, the thicker is the TiO2 layer, the lower is the metal migration.
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Authors
Fabjola Bilo, Laura Borgese, Josef Prost, Mirjam Rauwolf, Anna Turyanskaya, Peter Wobrauschek, Peter Kregsamer, Christina Streli, Ugo Pazzaglia, Laura E. Depero,