1. Unit of Periodontology, Department of Restorative Dentistry, Periodontology, and Endodontology; Ernst-Moritz-Arndt-University Greifswald; Greifswald; Germany
2. Department of Prosthodontics, Gerodontology, and Biomaterials; Ernst-Moritz-Arndt-University Greifswald; Greifswald; Germany
3. Department of Maxillofacial Surgery and Plastic Surgery; Ernst-Moritz-Arndt-University Greifswald; Greifswald; Germany