Document Type : Original Article
Authors
1 Lecturer Assistant of Oral Medicine, Periodontology, Oral Diagnosis and Radiology Department. Faculty of Dental Medicine Alazhar University Palestine.
2 Lecturer of Oral Biology Department. Faculty of Dental Medicine for Girls. Alazhar University.
3 Proffessor of Oral medicine,Periodontology, Oral Diagnosis and Radiology Department. Faculty of Dental Medicine for Girls. Alazhar University
Abstract