1. Department of Oral, Maxillofacial and Plastic Surgery , Rostock University Medical Center , Rostock , Germany
2. Department of Biomechanics and Implant Technology Research Laboratory , Rostock University Medical Center , Rostock , Germany
3. Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory , Rostock University Medical Center , Rostock , Mecklenburg-Vorpommern , Germany