作者单位:Institute of Anatomy, Christian-Albrechts University Kiel, Otto-Hahn-Platz 8, 24118 Kiel, Germany[1]Dental School, Department of Prosthodontics, Propaedeutics and Dental Materials, Christian[2]Department of Oral and Maxillofacial Surgery, Christian-Albrechts University Kiel, Arnold-Heller[3]