1. Department of Orthodontics Faculty of Dentistry Yeditepe University Istanbul Turkey
2. Department of Orthodontics Faculty of Dentistry Istanbul Okan University Istanbul Turkey
3. Department of Prosthodontics, Faculty of Dentistry Istanbul Okan University Istanbul Turkey
4. Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern Bern Switzerland
5. Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine University of Bern Bern Switzerland
6. Division of Restorative and Prosthetic Dentistry The Ohio State University Columbus OH