1. Department of Oral and Craniomaxillofacial Surgery; Center for Dental Medicine; University Medical Center Freiburg; Freiburg Germany
2. BAM Federal Institute for Materials Research and Testing; Berlin Germany
3. Department of Oral and Maxillofacial Surgery, Navigation and Robotics; Charité Campus Virchow; Berlin Germany
4. Department of Operative Dentistry and Periodontology; Center for Dental Medicine; University Medical Center; Freiburg Germany