1. Department of Prosthodontics; Cumhuriyet University Faculty of Dentistry; Sivas Turkey
2. Sultanbeyli Oral Health Center; Istanbul Turkey
3. University of Zurich, Head of Dental Materials Unit, Center for Dental and Oral Medicine; Clinic for Fixed and Removable Prosthodontics and Dental Materials Science; Zurich Switzerland
4. Department of Restorative Dentistry; Karadeniz Technical University Faculty of Dentistry; Trabzon Turkey