1. Department of Prosthetic Dentistry and Material Science, Centre for Dental Medicine, Jena University Hospital, 07743 Jena, Germany
2. Department of Geriatrics and Palliative Care, Klinikum Osnabrück GmbH, 49076 Osnabrück, Germany
3. Section of Preventive and Pediatric Dentistry, Department of Orthodontics, Centre for Dental Medicine, Jena University Hospital, 07743 Jena, Germany