1. Assistant Professor, Department of Prosthodontics; Ludwig-Maximilians-Universität; Goethestrasse 70 Munich 80336 Germany
2. Dentist, Private Practice Hürzeler/Zuhr and Department of Periodontology, Centre for Dental, Oral, and Maxillofacial Medicine (Carolinum); Johann Wolfgang Goethe-University Frankfurt/Main; Frankfurt Germany
3. Dentist, Private Practice Hürzeler/Zuhr, Munich, Germany and Department of Operative Dentistry and Periodontology; University of Freiburg; Freiburg Germany
4. Master Dental Technician, Plattform Laboratory; Goethestrasse 47 Munich 80336 Germany
5. PhD Student, Department of Dentistry; Federal University of Santa Catarina, Florianópolis, Brazil and Guest Dentist, Department of Prosthodontics, Ludwig-Maximilians-Universität; Goethestrasse 70 80336 Munich Germany
6. Director and Chair, Department of Prosthodontics; Ludwig-Maximilians-Universität; Goethestrasse 70 Munich 80336 Germany