1. Department of Oral, Maxillofacial and Plastic Surgery; University Medical Center Rostock; Rostock Germany
2. Department of Oral, Maxillofacial and Plastic Surgery; University Medical Center Mainz; Mainz Germany
3. Department of Oral and Maxillofacial Surgery and Oral Implantology; “A. Gutan” of the State University of Medicine and Pharmacy “N. Testemitanu,”; Chisinau Moldova