1. Department of Histology and Embryology, Faculty of Medicine; Ondokuz Mayıs University; Samsun Turkey
2. Departments of Restorative Dentistry, and Oral Diagnosis and Radiology, Faculty of Dentistry; Atatürk University; Erzurum Turkey
3. Department of Histology and Embryology; Faculty of Medicine, Atatürk University; Erzurum Turkey