1. Department of Prosthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
2. Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
3. Health Ministry Oral-Teeth Health Center, Bafra, Samsun, Turkey.
4. Department of Periodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.