[1] Department of Stomatology—Maxillofacial Surgery, General Teaching Hospital and First Faculty of Medicine, Charles University, Prague,121 08, Czech Republic
[2] Department of Anatomy, First Faculty of Medicine, Charles University, Prague,121 08, Czech Republic
[3] Department of Pathology, First Faculty of Medicine, Charles University, Prague,121 08, Czech Republic
[4] Department of Functional Materials, FZU The Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, Prague,182 21, Czech Republic
[5] Department of Metals and Corrosion Engineering, University of Chemistry and Technology, Technická 6, Prague,166 28, Czech Republic