1. Department of Prosthodontics, Faculty of Dentistry, Osmangazi University, Eskişehir, Turkey.
2. Ministry of Health Karapürçek Oral and Dental Health Clinics, Ankara, Turkey.
3. Department of Prosthodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey.
4. Department of Chemistry, Polymer Chemistry Division, Hacettepe University, Beytepe, Ankara, Turkey.