1. Department of Prosthetic Dentistry Center for Dental Medicine Medical Center – University of FreiburgFaculty of Medicine ‐ University of Freiburg Freiburg Germany
2. Department of Oral and Maxillofacial Surgery Berlin Institute of Health Corporate Member of Freie Universität Berlin Charité – Universitätsmedizin BerlinHumboldt‐Universität zu Berlin Berlin Germany
3. Department of Oral and Maxillofacial Surgery Center for Dental Medicine Medical Center – University of FreiburgFaculty of Medicine ‐ University of Freiburg Freiburg Germany