1. Department of Dentistry and Maxillofacial Surgery, Faculty of Medicine, Pavol Jozef Safarik University in Kosice, Tr. SNP 1, 040 01 Kosice, Slovakia
2. Institute of Materials Research, Slovak Academy of Sciences, ÚMV SAV Košice, 040 01 Kosice, Slovakia
3. Department of Stomatology and Maxillofacial Surgery, Faculty of Medicine, Pavol Jozef Safarik University in Kosice, Tr. SNP 1, 040 11 Kosice, Slovakia
4. Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy in Kosice, Komenskeho 73, 041 81 Kosice, Slovakia
5. Department of Stomatology, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic