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Application of Atomic Force Microscopy for Studies of Fractal and Functional Properties of Biomaterials

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Kulesza S., Bramowicz M., Czaja P., Jabłoński R., Kropiwnicki J., Charkiewicz M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1013-1015
EN
The paper presents results of numerical analysis of AFM images of a surface of sandblasted Ti6Al7Nb alloys before and after wet etching procedure usually used for preparing commercially viable dental implants. Obtained results demonstrate that etching procedure efficiently cleans the implants as it leaves almost pure Ti-Al-Nb surface with trace amounts of alkali metals and increased hydrophobicity. Apart of that, it turned out that simple statistical measures of the height variations (root mean square roughness) only slightly change upon the treatment procedure, especially for scan lengths below 20 μm. On the other hand, correlation analysis exhibits bifractal surface patterns composed of regular residues left on otherwise helical ridges of the base material. Etching leaves its fingerprint in fractal dimension, but not in the corner frequency.
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