1. Department of Oral and Maxillofacial Surgery, Federal Armed Forces Hospital, Koblenz, Germany
2. Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Mainz, Germany
3. Department of Prosthodontics, University Medical Center Mainz, Mainz, Germany
4. Institute for Microscopic Anatomy and Neurobiology, University Medical Center Mainz, Mainz, Germany