1. Department of Prosthodontics, School of Dentistry; Ege University; Izmir Turkey
2. University of Zürich, Dental Materials Unit, Center for Dental and Oral Medicine; Clinic for Fixed and Removable Prosthodontics and Dental Materials Science; Zürich Switzerland
3. Department of Prosthodontics, School of Dentistry; İzmir Katip Çelebi University; Izmir Turkey