Presentation on theme: "DR :TAGWA MIRGHANI. Is a group of tissue that involve with supporting the tooth. This tissue are gingiva, alveolar mucosa, cemuntum, periodontal ligament,and."— Presentation transcript:
Study of the extent of disease with in population group. Periodontal disease are very common and the severs form of it affects more than 10-15% of population. 30-35% of tooth extraction due it periodontal disease. and 50% due to caries.
Marginal bleeding index (MBI):.Clinical test by using periodontal probe around gingival sulcus. Percentage scores obtained by dividing by the number of the tooth and multiply the result by 100.