1. Department of Preventive and Restorative Sciences, Robert Schattner Center, Penn Dental Medicine University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Periodontology, Endodontology, and Cariology University Center for Dental Medicine Basel UZB, University of Basel Basel Switzerland
3. Department of Advanced Oral Sciences and Therapeutics, Division of Prosthodontics University of Maryland School of Dentistry, University of Maryland Baltimore Maryland USA
4. Department of Restorative Sciences, Advanced Education in Prosthodontics The Dental College of Georgia at Augusta University Augusta Georgia USA
5. Department of General Practice and Prosthodontics, School of Dentistry Virginia Commonwealth University Richmond Virginia USA
6. Department of Prosthetic Dentistry, Center for Dental Medicine Medical Center‐University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
7. Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders Charité‐Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin Berlin Germany
8. PROSEC gGmbH Bad Säckingen Germany
9. VITA Zahnfabrik Bad Säckingen Germany
10. Studio‐280 Houston Texas USA
11. School of Dentistry Virginia Commonwealth University Richmond Virginia USA
12. Master's Arch Phoenix Arizona USA
13. Department of Restorative Dentistry University of Illinois College of Dentistry Chicago Illinois USA
14. Department of Restorative Dentistry and Prosthodontics, John M. Powers, PhD, Center for Biomaterials and Biomimetics The University of Texas School of Dentistry at Houston Houston Texas USA
15. Pizzi Dental Studio Staten Island New York USA