Affiliation: | 1. Private practice, Stuttgart, Germany;2. Department of Conservative Dentistry and Periodontology, University Hospital of Würzburg, Würzburg, Germany;3. Department of Periodontology, Endodontology and Cariology, University Centre for Dental Medicine, University of Basel, Basel, Switzerland;4. Department of Conservative Dentistry, University of Tuebingen, Tuebingen, Germany |