On Thursday (13/2/2025), the doctoral dissertation of the Ph.D. student (Khalid Mohammed Sharef - Conservative) was successfully discussed in the Department of Conservative at the College of Dentistry in the presence of the Dean of the College, Assistant Professor Dr. Saeed Ali Muhammed and the Head of the Department of Higher Studies and Scientific Affairs, Assistant Professor Dr. Firas Abdulmalek Mohammed. The discussion committee consisted of: 1. Prof. Dr. Bahar Jaafar Haji/ College of Dentistry/ University of Duhok (Chairman) 2. Prof. Dr. Emad Farhan Ali/ College of Dentistry/ University of Mosul (Member) 3. Prof. Dr. Bassam Kareem Amin/ College of Dentistry/ Hawler Medical University (Member) 4. Prof. Dr. Diyar Khalid Bakr/ College of Dentistry/ Hawler Medical University (Member) 5. Assist-Prof. Dr. Moataz Khazi Saadallah/ College of Dentistry/ Al-Noor University (Member) (Member) 6. Assist-Prof. Dr. Abdulkareem Ramadhan Ibrahim/ College of Dentistry/ University of Duhok (Member and Supervisor). 7. Assist-Prof. Dr. Hadar Saeed Faizy/ College of Agricultural Engineering Sciences/ University of Duhok (Member and Supervisor).