1. Department of Operative Dentistry and Periodontology, University Medical Center Rostock, 18057 Rostock, Germany
2. Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Rostock, 18057 Rostock, Germany
3. Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, University Medical Center Rostock, 18057 Rostock, Germany
4. Medical Biology and Electron Microscopy Centre, University Medical Center Rostock, 18057 Rostock, Germany